Estimate a video's effect on sales from viewing intensity across markets
Causal inferenceHardProblem. You want to estimate how much a main-channel video lifted Feastables sales, using weekly sales per store across 40 markets and each market's views of the video per 100 people. The video went out everywhere at the same time. Build the analysis, and say how you'd check it.
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.