Machine Learning, AI, ML, Decision Trees, Probability.
in its name): Classifier 1 (by platform): Left leaf (iPhone): {A, C, C} Right leaf (Android): {A, A, B} Classifier 2 (by age): Left leaf (young): {A, A, A} Right leaf (adult): {B, C, C} The Gini indices of the sets {A,C,C}, {A,A,B}, and {B,C,C} are all the same: 1–1-(2/3)² — (1/3)² = 0.444. The