Reserving an Elevator for Food Deliveries
Company: Coupang
Role: Data Scientist
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Technical Screen
Overview: This question tests a data scientist's ability to design a rigorous A/B experiment for a real-world operational policy with competing stakeholder outcomes. It evaluates expertise in experiment design concepts including cluster randomization, switchback designs, metric selection, guardrail metrics, and intent-to-treat analysis — core skills assessed in analytics and experimentation interviews.
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