Balance Scale Multi-class Imbalanced data set 1: Description. An imbalanced version of the Balance Scale data set, where there are some classes with a small number of examples while other classes have a large number of examples. 2: Type. Imbalanced 3: Origin. Real world 4: Instances. 625 5: Features. 4 6: Classes. 3 7: Missing values. No 8: IR: 5.88 9: Header. @relation unknow @attribute left-weight real [1.0, 5.0] @attribute left-distance real [1.0, 5.0] @attribute right-weight real [1.0, 5.0] @attribute right-distance real [1.0, 5.0] @attribute class {L, B, R} @inputs left-weight, left-distance, right-weight, right-distance @outputs class