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2 questions
Triage a sample-ratio mismatch
ProA nominal 50/50 Meta messaging experiment reports 520,000 control users and 480,000 treatment users.
Written case · Readout · 20 min · Hard
Experimentation & A/B Testing · Reported at Meta
Spot a novelty effect in a VR interface test
A new VR interface lifts daily use by 18% in days 1–3, 7% in days 4–7, and 0% in days 8–21.
Quick check · Readout · 7 min · Easy
Experimentation & A/B Testing · Reported at Meta