Problem
Scenario
You notice that a key product metric moved, and the team wants to know whether it reflects a real change or a recurring calendar pattern. You have historical daily data and need to separate normal seasonality from an unusual shift.
Question
How would you investigate whether a metric moved because of a seasonality pattern?
What this tests
- Recognizing seasonality in product metrics
- Building a seasonal baseline from historical data
- Testing whether post-period residuals differ from zero
- Using regression controls to separate calendar effects from real shifts
Practicing as: Product Growth Analyst interview at QuoraHi, I'll play your Quora interviewer for the Product Growth Analyst role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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