Coles Group Data Scientist Interview Questions
The questions to prepare for a Coles Group Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Calculate category-level average order value and return the five highest categories with deterministic tie-breaking.
Calculate three-row moving averages with SQL window frames after aggregating order data by seller and date.
Return employees earning the second-highest distinct salary within each department, including salary ties.
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ABC FamilyDesign a north-star metric and measurement plan to determine whether Ekimetrics' loyalty program creates sustained customer and business value.
Explain statistical significance, p-values, practical importance, and uncertainty to a non-technical stakeholder.
Diagnose a sudden 20% KPI decline by validating measurement, decomposing drivers, and separating real behavior changes from data issues.
Determine the sample size needed to detect a meaningful A/B test effect at a chosen significance level and power.
Explain statistical significance, p-values, uncertainty, and practical importance to a non-technical audience.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
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