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Experimentation Strategy and Advanced Designs Questions

When and how to use advanced experimental methods and how to prioritize experiments to maximize learning and business impact. Candidates should understand factorial and multivariate designs interaction effects blocking and stratification sequential testing and adaptive designs and the trade offs between running many factors at once versus sequential A and B tests in terms of speed power and interpretability. The topic includes Bayesian and frequentist analysis choices techniques for detecting heterogeneous treatment effects and methods to control for multiple comparisons. At the strategy level candidates should be able to estimate expected impact effort confidence and reach for proposed experiments apply prioritization frameworks to select experiments and reason about parallelization limits resource constraints tooling and monitoring. Candidates should also be able to communicate complex experimental results recommend staged follow ups and design experiments to answer higher order questions about interactions and heterogeneity.

HardTechnical
0 practiced
Design an experiment to measure long-term effects (e.g., retention at 90 days) while balancing the business need for fast decisions. Include sample size considerations, interim analyses, and how to report both short-term and long-term metrics without misleading stakeholders.
EasyTechnical
0 practiced
Define statistical power and minimum detectable effect (MDE). For a primary conversion metric baseline of 5%, baseline traffic of 200k users/day and 80% power, outline the thought process you would use to estimate whether a proposed 1% relative lift is detectable within a two-week experiment.
EasyTechnical
0 practiced
Compare Bayesian and frequentist approaches for analyzing A/B test results. Give an example situation where Bayesian methods provide practical advantages for a growth team and one situation where frequentist inference might still be preferable.
EasyTechnical
0 practiced
Define a 2^k factorial design and explain when a data analyst should recommend a factorial experiment instead of a sequence of A/B tests. Include pros and cons related to discovering interactions, speed of learning, and sample size efficiency.
MediumTechnical
0 practiced
You ran a 2x2 factorial and found a statistically significant interaction between factors A and B. Describe an analysis plan to understand the business meaning of the interaction, including visualization, post-hoc comparisons, and how you'd recommend rollout.

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