Contraceptive Method Choice Multi-class Imbalanced data set 1: Description. An imbalanced version of the Contraceptive Method Choice 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. 1473 5: Features. 9 6: Classes. 3 7: Missing values. No 8: IR: 1.89 9: Header. @relation unknow @attribute a1 real [16.0, 49.0] @attribute a2 real [1.0, 4.0] @attribute a3 real [1.0, 4.0] @attribute a4 real [0.0, 16.0] @attribute a5 {0, 1} @attribute a6 {0, 1} @attribute a7 real [1.0, 4.0] @attribute a8 real [1.0, 4.0] @attribute a9 {0, 1} @attribute class {1, 2, 3} @inputs a1, a2, a3, a4, a5, a6, a7, a8, a9 @outputs class