Run a clean A/B test for autocomplete

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This is a hard difficulty Analytics & Experimentation question, commonly asked during Technical Screen rounds at Etsy.

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This question is commonly asked for Data Scientist candidates at Etsy during technical interviews.

Question

Run a clean A/B test for autocomplete

PracHub · Accepted Answer

This question evaluates experimental-design and causal-inference competency for online A/B testing of ML-ranked autocomplete, covering metric formulation, variance-reduction strategies, sample-size computation, and operational validity considerations.

Run a clean A/B test for autocomplete

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Run a clean A/B test for autocomplete

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