Chance nodes – typically represented by circles.Decision nodes – typically represented by squares.In decision analysis, a decision tree and the closely related influence diagram are used as a visual and analytical decision support tool, where the expected values (or expected utility) of competing alternatives are calculated.Ī decision tree consists of three types of nodes: The paths from root to leaf represent classification rules. whether a coin flip comes up heads or tails), each branch represents the outcome of the test, and each leaf node represents a class label (decision taken after computing all attributes).
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