IBk classifier: k = 6 === Error on training data === Correctly Classified Instances 432 86.2275 % Incorrectly Classified Instances 69 13.7725 % Mean absolute error 0.1377 Root mean squared error 0.3711 Relative absolute error 39.3552 % Root relative squared error 88.7947 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 52 61 | a = >50K 8 380 | b = <=50K === Error on test data === Correctly Classified Instances 414 82.6347 % Incorrectly Classified Instances 87 17.3653 % Mean absolute error 0.1737 Root mean squared error 0.4167 Relative absolute error 49.1619 % Root relative squared error 98.7847 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 45 71 | a = >50K 16 369 | b = <=50K