Advanced Data Analysis and Statistics Questions
Focuses on higher level analytical and statistical techniques for interpreting data and testing hypotheses. Topics include time series analysis, cohort and segmentation analysis, correlation and causation distinctions, descriptive versus inferential statistics, experimental design and hypothesis testing, consideration of sample size and power, detection of confounding variables including Simpson s paradox, and practical interpretation of results and limitations. Emphasizes choosing appropriate methods for given questions and communicating statistical findings clearly.
MediumTechnical
0 practiced
Create a step-by-step process to detect and explain an anomalous drop in a metric (e.g., purchases) that occurred last Tuesday. Include what visualizations, segmentation checks, and statistical tests you would run within the first hour, and which deeper analyses you would run over the next day.
HardTechnical
0 practiced
You built a linear regression model predicting monthly revenue from ad_spend, product_price, and seasonality dummies. The model shows a significant positive coefficient for ad_spend. Describe checks you would perform to ensure this coefficient reflects a causal effect rather than correlation.
MediumTechnical
0 practiced
A dashboard shows monthly retention decreased after a UI change. The PM wants to attribute the decline to the UI. What steps do you take to validate or refute this causal claim using available observational data? Include specific analyses and potential limitations.
HardTechnical
0 practiced
Provide a practical checklist and SQL snippets for validating that the difference in conversion rates between control and treatment groups in an A/B test is not due to instrumentation issues (e.g., tracking fires twice, user assignment leakage).
EasyBehavioral
0 practiced
A senior stakeholder wants a single-sentence conclusion from a complex inferential analysis that includes multiple tests and caveats. Describe your approach to writing that conclusion and what supporting materials you would provide to ensure responsible interpretation.
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