diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/README.md b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/README.md
new file mode 100644
index 000000000000..8c4fc5c3c186
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/README.md
@@ -0,0 +1,256 @@
+
+
+# Mean
+
+> [Wald][wald-distribution] distribution [expected value][mean].
+
+
+
+
+
+The [expected value][mean] for a [Wald][wald-distribution] random variable with mean `μ` and shape parameter `λ > 0` is
+
+
+
+```math
+\mathbb{E}\left[ X \right] = \mu
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var mean = require( '@stdlib/stats/base/dists/wald/mean' );
+```
+
+#### mean( mu, lambda )
+
+Returns the [expected value][mean] for a [Wald][wald-distribution] distribution with parameters `mu` (mean) and `lambda` (shape parameter).
+
+```javascript
+var y = mean( 2.0, 1.0 );
+// returns 2.0
+
+y = mean( 0.0, 1.0 );
+// returns NaN
+
+y = mean( -1.0, 4.0 );
+// returns NaN
+```
+
+If provided `NaN` as any argument, the function returns `NaN`.
+
+```javascript
+var y = mean( NaN, 1.0 );
+// returns NaN
+
+y = mean( 0.0, NaN );
+// returns NaN
+```
+
+If provided `mu <= 0` or `lambda <= 0`, the function returns `NaN`.
+
+```javascript
+var y = mean( 0.0, 0.0 );
+// returns NaN
+
+y = mean( 0.0, -1.0 );
+// returns NaN
+
+y = mean( -1.0, 0.0 );
+// returns NaN
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var mean = require( '@stdlib/stats/base/dists/wald/mean' );
+
+var opts = {
+ 'dtype': 'float64'
+};
+var mu = uniform( 10, EPS, 10.0, opts );
+var lambda = uniform( 10, EPS, 20.0, opts );
+
+logEachMap( 'µ: %0.4f, λ: %0.4f, E(X;µ,λ): %0.4f', mu, lambda, mean );
+```
+
+
+
+
+
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
+
+
+
+
+
+
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/wald/mean.h"
+```
+
+#### stdlib_base_dists_wald_mean( mu, lambda )
+
+Returns the [expected value][mean] for a [Wald][wald-distribution] distribution with mean `mu` and shape parameter `lambda`.
+
+```c
+double out = stdlib_base_dists_wald_mean( 2.0, 1.0 );
+// returns 2.0
+```
+
+The function accepts the following arguments:
+
+- **mu**: `[in] double` mean.
+- **lambda**: `[in] double` shape parameter.
+
+```c
+double stdlib_base_dists_wald_mean( const double mu, const double lambda );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Examples
+
+```c
+#include "stdlib/stats/base/dists/wald/mean.h"
+#include
+#include
+
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+int main( void ) {
+ double lambda;
+ double mu;
+ double y;
+ int i;
+
+ for ( i = 0; i < 10; i++ ) {
+ mu = random_uniform( 0.1, 5.0 );
+ lambda = random_uniform( 0.1, 20.0 );
+ y = stdlib_base_dists_wald_mean( mu, lambda );
+ printf( "µ: %.4f, λ: %.4f, Mean(X;µ,λ): %.4f\n", mu, lambda, y );
+ }
+}
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[wald-distribution]: https://en.wikipedia.org/wiki/Inverse_Gaussian_distribution
+
+[mean]: https://en.wikipedia.org/wiki/Mean
+
+
+
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/benchmark.js
new file mode 100644
index 000000000000..dd53b851ad54
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/benchmark.js
@@ -0,0 +1,59 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var pkg = require( './../package.json' ).name;
+var mean = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var lambda;
+ var opts;
+ var mu;
+ var y;
+ var i;
+
+ opts = {
+ 'dtype': 'float64'
+ };
+ mu = uniform( 100, EPS, 100.0, opts );
+ lambda = uniform( 100, EPS, 20.0, opts );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = mean( mu[ i % 100 ], lambda[ i % 100 ] );
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/benchmark.native.js
new file mode 100644
index 000000000000..529f081d381c
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/benchmark.native.js
@@ -0,0 +1,69 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var mean = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( mean instanceof Error )
+};
+
+
+// MAIN //
+
+bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
+ var arrayOpts;
+ var lambda;
+ var mu;
+ var y;
+ var i;
+
+ arrayOpts = {
+ 'dtype': 'float64'
+ };
+ mu = uniform( 100, EPS, 100.0, arrayOpts );
+ lambda = uniform( 100, EPS, 20.0, arrayOpts );
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ y = mean( mu[ i % 100 ], lambda[ i % 100 ] );
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnan( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/c/Makefile
new file mode 100644
index 000000000000..979768abbcec
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := benchmark.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled benchmarks.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/c/benchmark.c b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/c/benchmark.c
new file mode 100644
index 000000000000..1a4a2fa23df5
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/benchmark/c/benchmark.c
@@ -0,0 +1,140 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/mean.h"
+#include
+#include
+#include
+#include
+#include
+
+#define NAME "wald-mean"
+#define ITERATIONS 1000000
+#define REPEATS 3
+
+/**
+* Prints the TAP version.
+*/
+static void print_version( void ) {
+ printf( "TAP version 13\n" );
+}
+
+/**
+* Prints the TAP summary.
+*
+* @param total total number of tests
+* @param passing total number of passing tests
+*/
+static void print_summary( int total, int passing ) {
+ printf( "#\n" );
+ printf( "1..%d\n", total ); // TAP plan
+ printf( "# total %d\n", total );
+ printf( "# pass %d\n", passing );
+ printf( "#\n" );
+ printf( "# ok\n" );
+}
+
+/**
+* Prints benchmarks results.
+*
+* @param elapsed elapsed time in seconds
+*/
+static void print_results( double elapsed ) {
+ double rate = (double)ITERATIONS / elapsed;
+ printf( " ---\n" );
+ printf( " iterations: %d\n", ITERATIONS );
+ printf( " elapsed: %0.9f\n", elapsed );
+ printf( " rate: %0.9f\n", rate );
+ printf( " ...\n" );
+}
+
+/**
+* Returns a clock time.
+*
+* @return clock time
+*/
+static double tic( void ) {
+ struct timeval now;
+ gettimeofday( &now, NULL );
+ return (double)now.tv_sec + (double)now.tv_usec/1.0e6;
+}
+
+/**
+* Generates a random number on the interval [min,max).
+*
+* @param min minimum value (inclusive)
+* @param max maximum value (exclusive)
+* @return random number
+*/
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+/**
+* Runs a benchmark.
+*
+* @return elapsed time in seconds
+*/
+static double benchmark( void ) {
+ double elapsed;
+ double lambda[ 100 ];
+ double mu[ 100 ];
+ double y;
+ double t;
+ int i;
+
+ for ( i = 0; i < 100; i++ ) {
+ mu[ i ] = random_uniform( 0.1, 10.0 );
+ lambda[ i ] = random_uniform( 0.1, 10.0 );
+ }
+
+ t = tic();
+ for ( i = 0; i < ITERATIONS; i++ ) {
+ y = stdlib_base_dists_wald_mean( mu[ i%100 ], lambda[ i%100 ] );
+ if ( y != y ) {
+ printf( "should not return NaN\n" );
+ break;
+ }
+ }
+ elapsed = tic() - t;
+ if ( y != y ) {
+ printf( "should not return NaN\n" );
+ }
+ return elapsed;
+}
+
+/**
+* Main execution sequence.
+*/
+int main( void ) {
+ double elapsed;
+ int i;
+
+ // Use the current time to seed the random number generator:
+ srand( time( NULL ) );
+
+ print_version();
+ for ( i = 0; i < REPEATS; i++ ) {
+ printf( "# c::%s\n", NAME );
+ elapsed = benchmark();
+ print_results( elapsed );
+ printf( "ok %d benchmark finished\n", i+1 );
+ }
+ print_summary( REPEATS, REPEATS );
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/binding.gyp b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/binding.gyp
new file mode 100644
index 000000000000..f343843f5bd2
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/binding.gyp
@@ -0,0 +1,170 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A `.gyp` file for building a Node.js native add-on.
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # List of files to include in this file:
+ 'includes': [
+ './include.gypi',
+ ],
+
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Target name should match the add-on export name:
+ 'addon_target_name%': 'addon',
+
+ # Set variables based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="win"',
+ {
+ # Define the object file suffix:
+ 'obj': 'obj',
+ },
+ {
+ # Define the object file suffix:
+ 'obj': 'o',
+ }
+ ], # end condition (OS=="win")
+ ], # end conditions
+ }, # end variables
+
+ # Define compile targets:
+ 'targets': [
+
+ # Target to generate an add-on:
+ {
+ # The target name should match the add-on export name:
+ 'target_name': '<(addon_target_name)',
+
+ # Define dependencies:
+ 'dependencies': [],
+
+ # Define directories which contain relevant include headers:
+ 'include_dirs': [
+ # Local include directory:
+ '<@(include_dirs)',
+ ],
+
+ # List of source files:
+ 'sources': [
+ '<@(src_files)',
+ ],
+
+ # Settings for the add-on:
+ 'link_settings': {
+ # Define libraries:
+ 'libraries': [
+ '<@(libraries)',
+ ],
+
+ # Define library directories:
+ 'library_dirs': [
+ '<@(library_dirs)',
+ ],
+ },
+
+ # C flags:
+ 'cflags': [
+ # Enable commonly used warning options:
+ '-Wall',
+
+ # Set optimization level:
+ '-O3',
+ ],
+
+ # C specific flags:
+ 'cflags_c': [
+ # Specify the C standard to which a program is expected to conform:
+ '-std=c99',
+ ],
+
+ # C++ specific flags:
+ 'cflags_cpp': [
+ # Specify the C++ standard to which a program is expected to conform:
+ '-std=c++11',
+ ],
+
+ # Linker flags:
+ 'ldflags': [],
+
+ # Apply conditions based on the host OS:
+ 'conditions': [
+ [
+ 'OS=="mac"',
+ {
+ # Linker flags:
+ 'ldflags': [
+ '-undefined dynamic_lookup',
+ '-Wl,-no-pie',
+ '-Wl,-search_paths_first',
+ ],
+ },
+ ], # end condition (OS=="mac")
+ [
+ 'OS!="win"',
+ {
+ # C flags:
+ 'cflags': [
+ # Generate position-independent code (PIC):
+ '-fPIC',
+ ],
+ },
+ ], # end condition (OS!="win")
+ ], # end conditions
+ }, # end target
+
+ # Target to copy the add-on to a standard location:
+ {
+ 'target_name': 'copy_addon',
+
+ # Specify the target type:
+ 'type': 'none',
+
+ # Define dependencies:
+ 'dependencies': [
+ # Require that the add-on be built before moving to a standard location:
+ '<(addon_target_name)',
+ ],
+
+ # Define a list of actions:
+ 'actions': [
+ {
+ 'action_name': 'copy_addon',
+ 'message': 'Copying addon...',
+
+ # Explicitly list the inputs in the command-line invocation below:
+ 'inputs': [],
+
+ # Declare the expected outputs:
+ 'outputs': [
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+
+ # Define the command-line invocation:
+ 'action': [
+ 'cp',
+ '<(PRODUCT_DIR)/<(addon_target_name).node',
+ '<(addon_output_dir)/<(addon_target_name).node',
+ ],
+ },
+ ], # end actions
+ }, # end target
+ ], # end targets
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/repl.txt b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/repl.txt
new file mode 100644
index 000000000000..30595320e8e9
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/repl.txt
@@ -0,0 +1,40 @@
+
+{{alias}}( μ, λ )
+ Returns the expected value of a Wald distribution with mean `μ` and
+ shape parameter `λ`.
+
+ If provided `NaN` as any argument, the function returns `NaN`.
+
+ If provided `μ <= 0` or `λ <= 0` the function returns `NaN`.
+
+ Parameters
+ ----------
+ μ: number
+ Mean parameter.
+
+ λ: number
+ Shape parameter.
+
+ Returns
+ -------
+ out: number
+ Expected value.
+
+ Examples
+ --------
+ > var y = {{alias}}( 4.0, 2.0 )
+ 4.0
+ > y = {{alias}}( 0.0, 1.0 )
+ NaN
+ > y = {{alias}}( 1.0, 0.0 )
+ NaN
+ > y = {{alias}}( NaN, 1.0 )
+ NaN
+ > y = {{alias}}( 0.0, NaN )
+ NaN
+ > y = {{alias}}( 0.0, 0.0 )
+ NaN
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/types/index.d.ts
new file mode 100644
index 000000000000..12e6f02811dc
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/types/index.d.ts
@@ -0,0 +1,61 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Returns the expected value for a Wald distribution with mean `mu` and shape parameter `lambda`.
+*
+* ## Notes
+*
+* - If provided `mu <= 0` or `lambda <= 0`, the function returns `NaN`.
+*
+* @param mu - mean
+* @param lambda - shape parameter
+* @returns expected value
+*
+* @example
+* var y = mean( 5.0, 2.0 );
+* // returns 5.0
+*
+* @example
+* var y = mean( 0.0, 1.0 );
+* // returns NaN
+*
+* @example
+* var y = mean( 1.0, 0.0 );
+* // returns NaN
+*
+* @example
+* var y = mean( NaN, 1.0 );
+* // returns NaN
+*
+* @example
+* var y = mean( 0.0, NaN );
+* // returns NaN
+*
+* @example
+* var y = mean( 0.0, 0.0 );
+* // returns NaN
+*/
+declare function mean( mu: number, lambda: number ): number;
+
+
+// EXPORTS //
+
+export = mean;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/types/test.ts b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/types/test.ts
new file mode 100644
index 000000000000..584afe7a8543
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/docs/types/test.ts
@@ -0,0 +1,56 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import mean = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ mean( 5, 2 ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided values other than two numbers...
+{
+ mean( true, 3 ); // $ExpectError
+ mean( false, 2 ); // $ExpectError
+ mean( '5', 1 ); // $ExpectError
+ mean( [], 1 ); // $ExpectError
+ mean( {}, 2 ); // $ExpectError
+ mean( ( x: number ): number => x, 2 ); // $ExpectError
+
+ mean( 9, true ); // $ExpectError
+ mean( 9, false ); // $ExpectError
+ mean( 5, '5' ); // $ExpectError
+ mean( 8, [] ); // $ExpectError
+ mean( 9, {} ); // $ExpectError
+ mean( 8, ( x: number ): number => x ); // $ExpectError
+
+ mean( [], true ); // $ExpectError
+ mean( {}, false ); // $ExpectError
+ mean( false, '5' ); // $ExpectError
+ mean( {}, [] ); // $ExpectError
+ mean( '5', ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+ mean(); // $ExpectError
+ mean( 3 ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/c/Makefile
new file mode 100644
index 000000000000..c8f8e9a1517b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+ CC := $(C_COMPILER)
+else
+ CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+ -std=c99 \
+ -O3 \
+ -Wall \
+ -pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+ fPIC ?=
+else
+ fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := example.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+ $(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled examples.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+ $(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+ $(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/c/example.c b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/c/example.c
new file mode 100644
index 000000000000..bd1fc1f63b32
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/c/example.c
@@ -0,0 +1,41 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/mean.h"
+#include
+#include
+
+static double random_uniform( const double min, const double max ) {
+ double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+ return min + ( v*(max-min) );
+}
+
+int main( void ) {
+ double lambda;
+ double mu;
+ double y;
+ int i;
+
+ for ( i = 0; i < 10; i++ ) {
+ mu = random_uniform( 0.1, 10.0 );
+ lambda = random_uniform( 0.1, 20.0 );
+ y = stdlib_base_dists_wald_mean( mu, lambda );
+ printf( "µ: %.4f, λ: %.4f, Mean(X;µ,λ): %.4f\n", mu, lambda, y );
+ }
+}
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/index.js b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/index.js
new file mode 100644
index 000000000000..05d0707d539f
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/examples/index.js
@@ -0,0 +1,32 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var mean = require( './../lib' );
+
+var opts = {
+ 'dtype': 'float64'
+};
+var mu = uniform( 10, EPS, 10.0, opts );
+var lambda = uniform( 10, EPS, 20.0, opts );
+
+logEachMap( 'µ: %0.4f, λ: %0.4f, E(X;µ,λ): %0.4f', mu, lambda, mean );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/include.gypi b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/include.gypi
new file mode 100644
index 000000000000..bee8d41a2caf
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/include.gypi
@@ -0,0 +1,53 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A GYP include file for building a Node.js native add-on.
+#
+# Main documentation:
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+ # Define variables to be used throughout the configuration for all targets:
+ 'variables': {
+ # Source directory:
+ 'src_dir': './src',
+
+ # Include directories:
+ 'include_dirs': [
+ '=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdmath",
+ "statistics",
+ "stats",
+ "distribution",
+ "dist",
+ "moments",
+ "wald",
+ "inverse gaussian",
+ "inverse-gaussian",
+ "continuous",
+ "mean",
+ "average",
+ "avg",
+ "expected",
+ "univariate"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/Makefile b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/Makefile
new file mode 100644
index 000000000000..2caf905cedbe
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/Makefile
@@ -0,0 +1,70 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+ QUIET := @
+else
+ QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+ OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+ OS := WINNT
+endif
+endif
+endif
+endif
+
+
+# RULES #
+
+#/
+# Removes generated files for building an add-on.
+#
+# @example
+# make clean-addon
+#/
+clean-addon:
+ $(QUIET) -rm -f *.o *.node
+
+.PHONY: clean-addon
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean: clean-addon
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/addon.c b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/addon.c
new file mode 100644
index 000000000000..921bcaca4890
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/addon.c
@@ -0,0 +1,23 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/mean.h"
+#include "stdlib/math/base/napi/binary.h"
+
+// cppcheck-suppress shadowFunction
+STDLIB_MATH_BASE_NAPI_MODULE_DD_D( stdlib_base_dists_wald_mean )
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/main.c b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/main.c
new file mode 100644
index 000000000000..580c2746f1e8
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/src/main.c
@@ -0,0 +1,43 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/wald/mean.h"
+#include "stdlib/math/base/assert/is_nan.h"
+
+/**
+* Returns the expected value for a Wald distribution with mean `mu` and shape parameter `lambda`.
+*
+* @param mu mean
+* @param lambda shape parameter
+* @return expected value
+*
+* @example
+* double y = stdlib_base_dists_wald_mean( 0.0, 1.0 );
+* // returns NaN
+*/
+double stdlib_base_dists_wald_mean( const double mu, const double lambda ) {
+ if (
+ stdlib_base_is_nan( mu ) ||
+ stdlib_base_is_nan( lambda ) ||
+ lambda <= 0.0 ||
+ mu <= 0.0
+ ) {
+ return 0.0/0.0; // NaN
+ }
+ return mu;
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/REQUIRE b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/REQUIRE
new file mode 100644
index 000000000000..98be20b58ed3
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/REQUIRE
@@ -0,0 +1,3 @@
+Distributions 0.23.8
+julia 1.5
+JSON 0.21
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/data.json b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/data.json
new file mode 100644
index 000000000000..cfbe8ef7b6da
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/data.json
@@ -0,0 +1 @@
+{"expected":[9.332225166166651,4.889545882546147,8.398178040760154,8.28051688606067,10.037308954804253,2.502718542102402,7.361144462873464,4.6290650686210615,3.876004579200079,6.422275131670353,5.847241707222778,6.366914991757955,6.3136965687091315,1.2616538066411815,4.603872427242848,6.537353892173539,8.152422851677493,1.0464547963763833,2.710612560595008,5.944344069327309,0.6086555872000572,0.9402142643524798,1.8975149191791791,2.5592660212610725,8.411190477424839,1.4511014402516482,4.2799661543123335,2.512582270176002,5.478377943405063,6.625790372383061,8.036417885893009,1.1434235434431035,7.248202965261169,8.544775430784588,6.5271560990783035,1.3854073031905918,3.7908552390293435,1.815739884828775,4.825403589669921,5.960258859303156,3.925089029468621,2.959680175704071,1.7875516365929784,6.213426082693141,8.64994577208829,3.9929816134159095,7.035341816019935,5.139750121604752,6.747818783777024,5.693593444380466,7.05406684061938,4.450504155891876,5.252334634220371,9.944308223267468,9.689955196930264,6.153056956375431,4.9280542385342905,2.7205997321763338,2.249596354937495,6.750055582351145,3.635697451623767,6.020983582313165,2.0717837310856453,8.981456445786328,3.3955035997359415,3.195439266997708,3.840112632688915,9.099141700744402,4.696500733424958,7.94650546435074,5.2091615442465065,7.0753291610803855,2.740360721587835,9.234198915716275,3.6722035577834906,10.427889780083783,4.740324983370824,8.842418004545316,6.979281384206059,4.802591338824032,1.2394947382676298,5.485967425903818,6.57451079630462,6.8115020527796055,9.467064551440531,1.5936804087224317,6.171478312926959,2.0670836797282597,1.8768815259656886,2.357093610486099,8.092423494889843,7.126466335129598,2.039090122605643,1.83883305304474,2.2139656913364543,5.313101099755819,10.313940850710054,6.407997714085795,4.90624429117303,6.326134887572925],"lambda":[2.4381925339491883,2.628465773755839,2.012417715510364,4.908152011660872,5.437712855580483,3.5147627620188313,3.5654756243202126,1.8864035976287563,3.7214821935143028,3.561295494770946,3.99299654368766,4.182714373347759,2.4322312368001797,1.0850379207148493,4.923607937241683,5.331454019181694,2.885192532622818,1.483219707457349,2.9188646901231543,3.6952372936097966,4.044363988019289,2.2253627070979007,0.7157494318796016,2.5543836806138067,3.491759685024702,4.175978377393404,1.1971987046049544,1.4297733585547903,3.3168607368505656,1.7768518171807341,3.050144075381506,3.5717388711090257,2.9973851576862938,4.921262332163632,2.0709001666268954,4.021963050650139,1.8658212960501874,2.626395603412256,3.4583673042203102,2.187448743710048,3.7608721257528988,4.909961938230089,4.309411892351908,4.847204812153579,3.3013301053257162,3.735041861540103,3.9436456488137104,1.0593494505193513,3.5335201403084366,1.815217279102599,4.438149145243953,2.5166107154618116,1.7890831926346662,0.6945042774788941,0.8330606603588548,4.474369071322663,4.365752800064446,3.433469757679817,5.187358162841649,1.444228760121607,1.3943371916314646,3.472040323569132,3.3563074908211323,5.137951285727967,1.6930458678935019,5.340337861356611,0.5945486754970865,2.0903826812135193,4.866339711556141,5.444112989230162,2.95153432830598,5.210912576640788,3.643765833412289,3.450363742570289,1.9534999609813204,3.419278729046406,4.571560172147398,4.138778622086694,0.9524871199264641,2.0320347697315673,2.395740547765334,2.3449989306891252,4.903041379839658,3.949913109763868,3.633227998396955,2.1386778304411327,4.8926733895923045,4.595379354367254,3.563893013691468,1.9479695009488813,2.825428629673149,4.153716960254766,5.034786199791013,3.7156836571853247,1.6200482700114267,1.2675216445740574,4.4435733332893,3.8831446700592065,5.337445608606271,4.497655899808191],"mu":[9.332225166166651,4.889545882546147,8.398178040760154,8.28051688606067,10.037308954804253,2.502718542102402,7.361144462873464,4.6290650686210615,3.876004579200079,6.422275131670353,5.847241707222778,6.366914991757955,6.3136965687091315,1.2616538066411815,4.603872427242848,6.537353892173539,8.152422851677493,1.0464547963763833,2.710612560595008,5.944344069327309,0.6086555872000572,0.9402142643524798,1.8975149191791791,2.5592660212610725,8.411190477424839,1.4511014402516482,4.2799661543123335,2.512582270176002,5.478377943405063,6.625790372383061,8.036417885893009,1.1434235434431035,7.248202965261169,8.544775430784588,6.5271560990783035,1.3854073031905918,3.7908552390293435,1.815739884828775,4.825403589669921,5.960258859303156,3.925089029468621,2.959680175704071,1.7875516365929784,6.213426082693141,8.64994577208829,3.9929816134159095,7.035341816019935,5.139750121604752,6.747818783777024,5.693593444380466,7.05406684061938,4.450504155891876,5.252334634220371,9.944308223267468,9.689955196930264,6.153056956375431,4.9280542385342905,2.7205997321763338,2.249596354937495,6.750055582351145,3.635697451623767,6.020983582313165,2.0717837310856453,8.981456445786328,3.3955035997359415,3.195439266997708,3.840112632688915,9.099141700744402,4.696500733424958,7.94650546435074,5.2091615442465065,7.0753291610803855,2.740360721587835,9.234198915716275,3.6722035577834906,10.427889780083783,4.740324983370824,8.842418004545316,6.979281384206059,4.802591338824032,1.2394947382676298,5.485967425903818,6.57451079630462,6.8115020527796055,9.467064551440531,1.5936804087224317,6.171478312926959,2.0670836797282597,1.8768815259656886,2.357093610486099,8.092423494889843,7.126466335129598,2.039090122605643,1.83883305304474,2.2139656913364543,5.313101099755819,10.313940850710054,6.407997714085795,4.90624429117303,6.326134887572925]}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/runner.jl b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/runner.jl
new file mode 100644
index 000000000000..dd137b329ab9
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/fixtures/julia/runner.jl
@@ -0,0 +1,73 @@
+#!/usr/bin/env julia
+#
+# @license Apache-2.0
+#
+# Copyright (c) 2026 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import Distributions: mean, InverseGaussian
+import JSON
+
+"""
+ gen( mu, lambda, name )
+
+Generate fixture data and write to file.
+
+# Arguments
+
+* `mu`: mean parameter
+* `lambda`: shape parameter
+* `name::AbstractString`: output filename
+
+# Examples
+
+``` julia
+julia> mu = rand( 1000 ) .* 10.0 .+ 0.1;
+julia> lambda = rand( 1000 ) .* 5.0 .+ 0.1;
+julia> gen( mu, lambda, "data.json" );
+```
+"""
+function gen( mu, lambda, name )
+ z = Array{Float64}( undef, length(mu) );
+ for i in eachindex(mu)
+ z[ i ] = mean( InverseGaussian( mu[i], lambda[i] ) );
+ end
+
+ # Store data to be written to file as a collection:
+ data = Dict([
+ ("mu", mu),
+ ("lambda", lambda),
+ ("expected", z)
+ ]);
+
+ # Based on the script directory, create an output filepath:
+ filepath = joinpath( dir, name );
+
+ # Write the data to the output filepath as JSON:
+ outfile = open( filepath, "w" );
+ write( outfile, JSON.json(data) );
+ write( outfile, "\n" );
+ close( outfile );
+end
+
+# Get the filename:
+file = @__FILE__;
+
+# Extract the directory in which this file resides:
+dir = dirname( file );
+
+# Generate fixtures:
+mu = rand( 100 ) .* 10.0 .+ 0.5;
+lambda = rand( 100 ) .* 5.0 .+ 0.5;
+gen( mu, lambda, "data.json" );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/test.js
new file mode 100644
index 000000000000..d71b01199f7d
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/test.js
@@ -0,0 +1,121 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var mean = require( './../lib' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof mean, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'if provided `NaN` for any parameter, the function returns `NaN`', function test( t ) {
+ var y = mean( NaN, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = mean( 1.0, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = mean( NaN, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ t.end();
+});
+
+tape( 'if provided a nonpositive `lambda`, the function returns `NaN`', function test( t ) {
+ var y;
+
+ y = mean( 2.0, 0.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( 2.0, -1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( 1.0, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( PINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NaN, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'if provided a nonpositive `mu`, the function returns `NaN`', function test( t ) {
+ var y;
+
+ y = mean( 0.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( -1.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, PINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function returns the expected value of a Wald distribution', function test( t ) {
+ var expected;
+ var lambda;
+ var mu;
+ var y;
+ var i;
+
+ expected = data.expected;
+ mu = data.mu;
+ lambda = data.lambda;
+ for ( i = 0; i < mu.length; i++ ) {
+ y = mean( mu[i], lambda[i] );
+ if ( y === expected[i] ) {
+ t.strictEqual( y, expected[i], 'mu:'+mu[i]+', lambda: '+lambda[i]+', y: '+y+', expected: '+expected[i] );
+ } else {
+ t.ok( isAlmostSameValue( y, expected[i], 20 ), 'within tolerance. mu: '+mu[i]+'. lambda: '+lambda[i]+'. y: '+y+'. E: '+expected[ i ]+'.' );
+ }
+ }
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/test.native.js
new file mode 100644
index 000000000000..20c76ab8ba72
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/wald/mean/test/test.native.js
@@ -0,0 +1,130 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var tape = require( 'tape' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
+var PINF = require( '@stdlib/constants/float64/pinf' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+
+
+// VARIABLES //
+
+var mean = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( mean instanceof Error )
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', opts, function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof mean, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'if provided `NaN` for any parameter, the function returns `NaN`', opts, function test( t ) {
+ var y = mean( NaN, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = mean( 1.0, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ y = mean( NaN, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+ t.end();
+});
+
+tape( 'if provided a nonpositive `lambda`, the function returns `NaN`', opts, function test( t ) {
+ var y;
+
+ y = mean( 2.0, 0.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( 2.0, -1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( 1.0, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( PINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NaN, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'if provided a nonpositive `mu`, the function returns `NaN`', opts, function test( t ) {
+ var y;
+
+ y = mean( 0.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( -1.0, 2.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, 1.0 );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, PINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, NINF );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ y = mean( NINF, NaN );
+ t.strictEqual( isnan( y ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function returns the expected value of a Wald distribution', opts, function test( t ) {
+ var expected;
+ var lambda;
+ var mu;
+ var y;
+ var i;
+
+ expected = data.expected;
+ mu = data.mu;
+ lambda = data.lambda;
+ for ( i = 0; i < mu.length; i++ ) {
+ y = mean( mu[i], lambda[i] );
+ if ( y === expected[i] ) {
+ t.strictEqual( y, expected[i], 'mu:'+mu[i]+', lambda: '+lambda[i]+', y: '+y+', expected: '+expected[i] );
+ } else {
+ t.ok( isAlmostSameValue( y, expected[i], 20 ), 'within tolerance. mu: '+mu[i]+'. lambda: '+lambda[i]+'. y: '+y+'. E: '+expected[ i ]+'.' );
+ }
+ }
+ t.end();
+});