Glossario IA

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Leaf node

Final node of a decision tree that has no child branches and provides the final prediction of the model.

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Root of the tree

Initial and unique node of a decision tree from which all data partitions are initiated.

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CART tree

Decision tree construction algorithm (Classification and Regression Trees) using binary splits and the Gini index as the main criterion.

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C4.5 tree

Decision tree algorithm that improves upon ID3 by handling continuous attributes and missing values, with entropy as the splitting criterion.

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CHAID tree

Algorithm based on the Chi-square test generating multi-way branching trees, particularly suited for survey and marketing data.