Regression Datasets used as gold standard Dataset Semantic of classes Size Source Cities Living style 212 Mercer AAUP Salary of professors 960 JSE Forbes Agency income 1,585 Forbes Albums Album popularity 1,600 Metacritic Movies Movie popularity 2,000 Metacritic Model and its configuration Model Configuration Linear Regression - M5Rules - k-NN k=3 Missing entities are simply ignored. The results are calculated using stratified 10-fold cross-validation. Output of the evaluation Metric Range Optimum Root Mean Squared Error (RMSE) [0,1] Lowest