Two metrics, opposite directions, one decision
Decide from resultsHardProblem. A feed change lifts GMV per session 5.4% (p = 0.002) and drops watch time per session 4.1% (p = 0.004). Both are significant. The PM wants to ship because GMV is the North Star. What do you say?
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.