IBk classifier: k = 10 === Error on training data === Correctly Classified Instances 421 84.0319 % Incorrectly Classified Instances 80 15.9681 % Mean absolute error 0.1597 Root mean squared error 0.3996 Relative absolute error 45.6293 % Root relative squared error 95.6109 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 45 68 | a = >50K 12 376 | b = <=50K === Error on test data === Correctly Classified Instances 406 81.0379 % Incorrectly Classified Instances 95 18.9621 % Mean absolute error 0.1896 Root mean squared error 0.4355 Relative absolute error 53.6826 % Root relative squared error 103.2267 % Total Number of Instances 501 === Confusion Matrix === a b <-- classified as 37 79 | a = >50K 16 369 | b = <=50K