Phase 15 · Interview Preparation
Case Studies & Product SenseA/B Testing & Experimentation Questions
Part of the Data Science Roadmap.
Summary
'How would you test whether this new model actually improves outcomes?' — connecting Phase 12's deployment A/B testing with the underlying statistics from Phase 2.
How to Learn This
- 1Review Phase 12's A/B testing content and practice designing a test for a model rollout.
- 2Prepare to discuss sample size, guardrail metrics, and how you'd interpret each possible result.
- 3Practice explaining why offline model metrics don't guarantee real-world business impact.
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