Coach note

Interviewers ask this kind of question to surface how you think, not what you remember. The strongest answers are specific, calmly told, and end on what changed.

Experiment design · Sample sizing and power

You're asked to test a feature that only affects 2% of users who complete a rare action. What sample size challenges do you face and how do you address them?

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You're asked to test a feature that only affects 2% of users who complete a rare action. What sample size challenges do you face and how do you address them?

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