Explain regression discontinuity with an example
Last updated: January 7, 2026
Quick Overview
Explain regression discontinuity in simple terms and provide a concrete example.
Stripe
Statistics & Math
Data Scientist
Stripe
January 7, 2026Data Scientist
Phone Screen
Statistics & Math
Easy
10
6
628 solved
Explain regression discontinuity in simple terms and provide a concrete example.
Stripe values data-driven decision making. This Phone Screen question assesses whether you can design experiments, interpret results correctly, and avoid common statistical pitfalls like p-hacking or Simpson's paradox.
What the Interviewer Expects
- State the correct formula or theorem with clear definitions
- Apply the concept to the given scenario step by step
- Interpret the result in plain language
- Identify assumptions and when they might be violated
Key Topics to Cover
Multiple testing correction (Bonferroni, FDR)
Bayesian vs frequentist inference
Conditional probability and Bayes theorem
Confidence intervals and significance levels
Regression analysis
How to Approach This
- Define your hypotheses (H0 and H1) clearly before performing any test.
- Calculate required sample size BEFORE running an experiment, using power analysis.
- Remember the Central Limit Theorem: sample means become approximately normal with large n.
- Watch for Simpson's paradox. Always segment data by key dimensions.
- Distinguish between statistical significance and practical significance.
Possible Follow-up Questions
- How would you explain this result to a non-technical audience?
- What assumptions does this test make, and how would you validate them?
- What if the sample size is very small?
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