Exam PA · Tree-Based Models · Free Lesson

Construct, prune, and validate regression and classification trees.

Free SOA Exam PA (Predictive Analytics) lesson in Tree-Based Models. 14 min read, ~2,080 words.

How a split is chosen. A tree searches every predictor and every candidate cutpoint, then keeps the split that most improves node purity. For classification, purity is measured two ways.

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