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Explain Simpson’s Paradox and Its Causes with Example

GoogleData Scientist · Technical Screen

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Evaluates Simpson's paradox through definition, confounding, subgroup imbalance, and a numeric reversal example. Strong answers compare stratified and aggregate rates and explain when each comparison matters.

Scenario

Interview question on Simpson’s paradox.

Question

Define Simpson’s paradox, explain how data imbalance or confounding can create it, and provide a concrete example.

Hints

Aggregation vs. stratification effects are key.