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Design an A/B Test for Homepage Layout Impact

AppleData Scientist · Onsite
MediumData ScientistOnsiteAnalytics & Experimentation

Last updated

This interview question evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistical checks, and recommendations in a realistic interview setting. A strong answer for Design an A/B Test for Homepage Layout Impact states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

Scenario

Designing an A/B test for a new homepage layout

Question

Describe how you would design an experiment to measure the impact of the new layout on purchase rate: population, metrics, randomization, sample size, duration, bias control, and analysis plan.

Hints

Mention success metric, guardrails, power analysis, segmentation, and validity threats.