=== Run information === Scheme: weka.classifiers.trees.J48 -C 0.25 -M 60 Relation: abalone Instances: 3675 Attributes: 9 sex length diameter height whole_weight shucked_weight viscera_weight shell_weight Age Test mode: 10-fold cross-validation === Classifier model (full training set) === J48 pruned tree ------------------ shell_weight <= 0.249 | shell_weight <= 0.154: Young (1140.0/147.0) | shell_weight > 0.154 | | shucked_weight <= 0.3025 | | | sex = M: Old (132.0/46.0) | | | sex = F: Old (142.0/34.0) | | | sex = I: Young (166.0/56.0) | | shucked_weight > 0.3025 | | | shucked_weight <= 0.3745 | | | | whole_weight <= 0.788: Young (159.0/40.0) | | | | whole_weight > 0.788: Old (69.0/25.0) | | | shucked_weight > 0.3745: Young (184.0/39.0) shell_weight > 0.249 | shucked_weight <= 0.3965: Old (356.0/55.0) | shucked_weight > 0.3965 | | shell_weight <= 0.2905 | | | diameter <= 0.455: Old (95.0/43.0) | | | diameter > 0.455: Young (130.0/53.0) | | shell_weight > 0.2905: Old (1102.0/192.0) Number of Leaves : 11 Size of the tree : 20 Time taken to build model: 0.04 seconds === Stratified cross-validation === === Summary === Correctly Classified Instances 2890 78.6395 % Incorrectly Classified Instances 785 21.3605 % Kappa statistic 0.5728 K&B Relative Info Score 152228.9879 % K&B Information Score 1522.2883 bits 0.4142 bits/instance Class complexity | order 0 3675.0001 bits 1 bits/instance Class complexity | scheme 2622.3966 bits 0.7136 bits/instance Complexity improvement (Sf) 1052.6035 bits 0.2864 bits/instance Mean absolute error 0.3123 Root mean squared error 0.399 Relative absolute error 62.4622 % Root relative squared error 79.7986 % Coverage of cases (0.95 level) 100 % Mean rel. region size (0.95 level) 100 % Total Number of Instances 3675 === Detailed Accuracy By Class === TP Rate FP Rate Precision Recall F-Measure MCC ROC Area PRC Area Class 0.803 0.23 0.777 0.803 0.79 0.573 0.829 0.808 Young 0.77 0.197 0.796 0.77 0.783 0.573 0.829 0.789 Old Weighted Avg. 0.786 0.214 0.787 0.786 0.786 0.573 0.829 0.798 === Confusion Matrix === a b <-- classified as 1477 362 | a = Young 423 1413 | b = Old === Re-evaluation on test set === User supplied test set Relation: abalone-test Instances: unknown (yet). Reading incrementally Attributes: 9 === Summary === Correctly Classified Instances 386 77.2 % Incorrectly Classified Instances 114 22.8 % Kappa statistic 0.5435 Mean absolute error 0.3175 Root mean squared error 0.4035 Coverage of cases (0.95 level) 100 % Total Number of Instances 500 === Detailed Accuracy By Class === TP Rate FP Rate Precision Recall F-Measure MCC ROC Area PRC Area Class 0.789 0.246 0.771 0.789 0.78 0.544 0.831 0.806 Young 0.754 0.211 0.773 0.754 0.763 0.544 0.831 0.781 Old Weighted Avg. 0.772 0.229 0.772 0.772 0.772 0.544 0.831 0.794 === Confusion Matrix === a b <-- classified as 202 54 | a = Young 60 184 | b = Old