Determine Impact of New Chat-Notification on User Engagement
GoogleData Scientist · Technical Screen
Last updated
Determine Impact of New Chat-Notification on User Engagement evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and interpretation in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Scenario
Product team wants to know whether a new chat-notification design increases daily active users in Google Workspace Chat.
Question
Design a causal inference study to estimate the notification feature’s impact on engagement. State identification strategy, required data, assumptions, and how you would validate those assumptions.
Hints
Randomized experiment vs. observational; diff-in-diff, propensity score, parallel-trends checks.
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