Problem
Join multiple user activity tables to find the average time elapsed between a user’s first app install and their first financial transaction on Square.
Practicing as: Data Scientist interview at SquareHi, I'll play your Square interviewer for the Data Scientist role. Candidates describe these interviews as often stressful and moderately difficult, so expect me to be direct and to the point. Take your time with the question above and answer like we're in the room.
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