IBk classifier: k = 3 === Error on training data === Correctly Classified Instances 449 89.6208 % Incorrectly Classified Instances 52 10.3792 % Mean absolute error 0.1038 Root mean squared error 0.3222 Relative absolute error 29.659 % Root relative squared error 77.084 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 78 35 | a = >50K 17 371 | b = <=50K === Error on test data === Correctly Classified Instances 397 79.2415 % Incorrectly Classified Instances 104 20.7585 % Mean absolute error 0.2076 Root mean squared error 0.4556 Relative absolute error 58.7683 % Root relative squared error 108.0058 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 53 63 | a = >50K 41 344 | b = <=50K