How would you measure billboard impact?
Company: Airwallex
Role: Data Scientist
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Onsite
Overview: This question evaluates a data scientist's skills in experiment and product design, causal inference (including propensity-score approaches), metric definition and trade-off analysis, power and sample-size estimation, and handling biases such as interference, repeated exposure, and heterogeneous effects.