Experiment Design and Execution Questions

Covers end to end design and execution of experiments and A B tests, including identifying high value hypotheses, defining treatment variants and control, ensuring valid randomization, defining primary and guardrail metrics, calculating sample size and statistical power, instrumenting events, running analyses and interpreting results, and deciding on rollout or rollback. Also includes building testing infrastructure, establishing organizational best practices for experimentation, communicating learnings, and discussing both successful and failed tests and their impact on product decisions.