Decide and test a 20% discount strategy

Company: DoorDash

Role: Data Scientist

Category: Analytics & Experimentation

Difficulty: hard

Interview Round: Onsite

Quick Answer: This question evaluates a data scientist's competency in incremental profit modeling, causal inference and experimentation design, heterogeneous treatment-effect estimation and targeting, sample-size and duration calculation, and operational rollout and monitoring using metrics like incremental gross profit and 90-day LTV.