Phase 2 Exam — Experimentation, Statistics & Data Culture

Topic 10 of 11 · In Data Driven Decisions · September 12, 2026

⏱ 75 minAssessment

Cumulative exam for Phase 2: causal A/B testing and its pitfalls, the statistical intuition behind intervals and Bayesian updates, and the organizational soil that makes DDDM stick.

Phase 2 Exam — Experimentation, Statistics & Data Culture

This exam closes Phase 2 of the Data-Driven Decisions path — the sense-making core: Experimentation & A/B Testing, Statistical Thinking for Decisions and Building a Data-Driven Culture.

Treat it like a real assessment: answer from memory, and read each explanation carefully. You need 70% or higher to pass the phase.

Phase 2 Exam — Experimentation, Statistics & Data Culture

Answer all questions. Exam conditions: no notes, no going back, one pressure per question.

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Question 1 of 8

To avoid contamination (users seeing both control and treatment), A/B test assignment should be randomized at the:

Finished? Review any question you missed, then revisit the related lessons via the hub or roadmap before moving on.

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