Analyze Negative Reviews' Impact on Coupon Repurchase Rate
Company: TikTok
Role: Data Scientist
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Technical Screen
##### Scenario
Management wants to measure how negative customer reviews affect the coupon repurchase rate.
##### Question
Design an analysis to quantify the impact of negative reviews on the probability a user repurchases the same coupon. Which data, model, or causal inference technique would you use to isolate the review effect from confounders?
##### Hints
Consider matched cohorts, fixed-effects regression, difference-in-differences, or propensity scoring to address selection bias.
Quick Answer: This question evaluates a data scientist's competency in causal inference, experimental design, and observational analytics, including the ability to define treatment and outcome, choose appropriate units and time windows, specify necessary exposure data, and address confounding.