🟢 Repeat: A/B Test Design

Without looking, list the 7 steps of designing an A/B test:

Try it, then check.

Answer: 1. Define hypothesis 2. Pick metrics (primary, secondary, guardrail) 3. Calculate sample size (n ≈ 16σ²/δ²) 4. Set duration (≥2 weeks) 5. Randomize by user (hash user ID) 6. Analyze at predetermined end date (no peeking) 7. Check statistical AND practical significance