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 have 100,000 daily active users and want to run a two-week test. Is this enough to detect a 5% change in a 20% baseline metric?

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You have 100,000 daily active users and want to run a two-week test. Is this enough to detect a 5% change in a 20% baseline metric?

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