Analyze time series and design validation experiment

Company: Google

Role: Data Scientist

Category: Analytics & Experimentation

Difficulty: hard

Interview Round: Onsite

Quick Answer: This question evaluates competency in time series analysis, change-point detection, count-based forecasting, causal inference and experiment design, along with skills in handling missing observations, multiplicative weekly seasonality, outliers, structural breaks, effect sizing, and concise executive communication.