Businesses that switched the feature on grew 30% faster. Did it cause that?
Measure impactHardProblem. A prototype feature in the Stripe Dashboard suggests checkout changes to businesses, such as which payment methods to show. Businesses switch it on themselves. In the quarter after switching it on, those businesses grew payment volume 30% faster than businesses that didn't. The team wants to use that number to make the case for a full launch. What do you tell them?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.