Machine Learning, AI, ML, Decision Trees, Probability.
Gini index of the set {A, A, A} is 1-(3/3)² = 0. Classifier 1 (by platform): Average Gini index = 12 (0.444+0.444) = 0.444 Classifier 2 (by age): Average Gini index = 12 (0.444+0) = 0.222. Figure 5. The two ways to split the dataset, by platform and age, and their Gini index calculations. We