Roblox Statistics & Math Interview Questions

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Roblox

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Derive variance and CTR confidence intervals

CTR as a Proportion: Estimation, Confidence Intervals, and Day-Level Variability Context: Click-through rate (CTR) is a proportion metric defined as C...

Implement robust one/two-sided p-value function

Implement p_value(stat, alternative, dist, df=None) Context: You're building a small, production-quality helper to compute p-values for common one- an...

Compute GSP vs VCG payments with reserves

Sponsored Search Auction with Quality Scores and Reserve You are analyzing a single-query auction with 2 ad slots. Position CTR multipliers are [0.10,...

Data Scientist Locked

Compute A/B test sample size and Bayes posterior

Part A: Minimum sample size for a two-sided A/B z-test You are given: - observed: an array of numeric outcomes from historical data (use it to estimat...

Statistics & Math

Oct 3, 2025