COMP682

Athabasca University (AU )

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COMP682 Data Mining Exam 2026 Graded A+
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5

January 2026

2025/2026

A+
1 What types of inputs do each of the 3 types of decision trees take? ID3: categorical only C4.5: numeric and categorical CART: numeric and categorical 2 How do each of the 3 types of decision trees split? ID3: max information gain and minimum entropy C4.5: information gain and gain ratio CART: Gini index and twoing creation 3 How do each of the 3 types of decision trees handle missing data? ID3: does not C4.5: omits from calculations CART: surrogate splits 4 What is CBA? ...
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