... same data! 10 © Tan,Steinbach, Kumar Introduction to Data Mining Decision Tree Classification Task Decision Tree © Tan,Steinbach, Kumar Introduction to Data Mining Apply Model to Test Data Test Data ... P(C2) = 4/ 6 Error = – max (2/6, 4/ 6) = – 4/ 6 = 1/3 Introduction to Data Mining 43 Comparison among Splitting Criteria For a 2-class problem: © Tan,Steinbach, Kumar Introduction to Data Mining 44 Misclassification ... > Yes 3 3 2 3 3 No 4 4 Gini © Tan,Steinbach, Kumar 0 .42 0 0 .40 0 0.375 0. 343 0 .41 7 Introduction to Data Mining 0 .40 0 0.300 0. 343 0.375 0 .40 0 0 .42 0 37 Alternative Splitting Criteria...