Revenue per checkout session is dominated by one business. Which test?
Test selectionMediumProblem. In the checkout prototype's test, the team also wants to know whether revenue per checkout session went up. One of the 18 businesses sells equipment with orders around $2,000, while most sell items around $40. A colleague ran a t-test on all sessions and got nothing. Another ran Mann-Whitney and got p = 0.003. Which test is right?
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.