Roblox Data Scientist Analytics & Experimentation Interview Questions
Practice 13 real Analytics & Experimentation interview questions for Data Scientist roles at Roblox.
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How to estimate feature impact on usage time
Problem A product team believes a new feature (or a variable you can influence, e.g., enabling notifications, new feed ranking, new UI) changes user t...
Compute DiD and validate parallel trends
You are given observational/experiment-like panel data as three equal-length arrays: - period[i]: an integer time period label for observation i (e.g....
Design experiment for homepage tab replacement
Experiment Design: Replacing a Homepage Tab and Measuring User + Ecosystem Impact Assume today is 2025-09-01. Roblox plans to replace an existing home...
How to estimate a feature’s causal impact on time spent
You work on a Roblox-like game platform. A new product change ("feature") is rolled out and you want to estimate its causal impact on user engagement,...
Compute minimum sample size for A/B test
You are implementing a function to compute the minimum total sample size for an A/B test. You are given: - observed: a 1D array of historical/baseline...
Compute DID estimate and pretrend flag
You are given three equal-length arrays describing observations from a panel-like dataset: - period[i] ∈ {0,1}: 0 = pre period, 1 = post period - trea...
Determine if players prefer local creators without experiments
You cannot run an A/B test. Define “local creators” as creators whose games use a player’s native language. Design an observational study to estimate ...
Evaluate friend-interaction feature with network interference
Experiment Design: Network-Aware Test for a "Friend Interaction Boost" in Feed Ranking Context You plan to ship a ranking change that boosts items in ...
Compute diff-in-diff and pretrend flag
You are given individual-level observational data for an experiment-like setting with: - period[i] ∈ {0,1}: 0 = pre period, 1 = post period - treatmen...
Determine Player Preference for Local Game Creators
Player Preference for Local Creators — Metrics and Causal Estimation Without A/B Tests Context You are evaluating whether players on Roblox prefer gam...
Design ad revenue A/B with guardrails
Mobile App Ads Marketplace: Experiment Plan to Lift Revenue by 10% in 60 Days Context You run a mobile app ads marketplace. Target is to increase ad r...
Evaluate Impact of New Roblox Homepage Tab
Measuring the Impact of Replacing a Homepage Tab Scenario Roblox plans to replace an existing homepage tab with a new one across eligible users. The g...
Design and analyze an ads ranking experiment
Ads Ranking Model: Experiment and Analysis Plan Context You are evaluating a new ads ranking model expected to increase revenue but potentially harm u...