IBk classifier: k = 2 === Error on training data === Correctly Classified Instances 446 89.022 % Incorrectly Classified Instances 55 10.978 % Mean absolute error 0.1098 Root mean squared error 0.3313 Relative absolute error 31.3701 % Root relative squared error 79.2763 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 58 55 | a = >50K 0 388 | b = <=50K === Error on test data === Correctly Classified Instances 395 78.8423 % Incorrectly Classified Instances 106 21.1577 % Mean absolute error 0.2116 Root mean squared error 0.46 Relative absolute error 59.8984 % Root relative squared error 109.0393 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 31 85 | a = >50K 21 364 | b = <=50K