Morrisons Data Scientist Interview Questions
The questions to prepare for a Morrisons Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Use aggregation and ranking to return the five highest-revenue customers within each region.
Calculate daily sales and a date-based 30-day rolling average using PostgreSQL window functions.
Aggregate watch minutes and rank the five most-watched shows within each region.
Design a north-star metric and measurement plan to determine whether Ekimetrics' loyalty program creates sustained customer and business value.
Diagnose a 5% drop in Intercom daily active users, separating data quality issues from real changes in user behavior.
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Identify the causes of a quarterly engagement decline through metric validation, decomposition, segmentation, and trend analysis.
Determine the sample size needed to detect a meaningful A/B test effect at a chosen significance level and power.
Explain how you evaluated a marketing campaign using funnel, efficiency, and business outcome metrics.
Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.