Problem
What pitfalls can invalidate an A/B test, such as peeking, novelty effects, network interference, or sample ratio mismatch?
Practicing as: Data Scientist interview at CGIHi, I'll play your CGI interviewer for the Data Scientist role. Candidates describe these interviews as mostly positive and moderately difficult, so expect me to be friendly and conversational. Take your time with the question above and answer like we're in the room.
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