Explain Simpson's paradox with an example
Last updated: March 5, 2026
Quick Overview
Explain Simpson's paradox in simple terms and provide a concrete example.
Supabase
March 5, 20262
5
756 solved
Explain Simpson's paradox in simple terms and provide a concrete example.
Analytics questions at Supabase evaluate your ability to define metrics, design experiments, and derive actionable insights from data. This Technical Screen question tests your end-to-end analytical thinking.
What the Interviewer Expects
- Define clear success metrics aligned with business goals
- Propose a basic experimental design with control and treatment groups
- Interpret results correctly and draw reasonable conclusions
- Identify obvious confounding variables
Key Topics to Cover
How to Approach This
- Define success metrics carefully. A good metric is measurable, actionable, and aligned with business goals.
- Run experiments long enough to account for novelty effects and weekly seasonality.
- Use funnel analysis to identify where users drop off for maximum optimization impact.
- Segment results by key dimensions (platform, country, user cohort) to catch hidden patterns.
- Consider network effects and interference between treatment and control groups.
Possible Follow-up Questions
- What if you discover a bug in the logging during the experiment?
- How would you handle seasonality in your experiment?
- What would you do if a stakeholder wants to end the experiment early because initial results look good?
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Browse Analytics QuestionsSample Answer
Problem Setup
Simpson's Paradox occurs when a trend appears in different groups of data but disappears or reverses when these groups are combined. For Supabase, we can investigate this paradox by looking at user en...
Methodology
To analyze Simpson's Paradox in this context, we will use a segmented analysis approach.
- Segmentation: We will segment users into two groups based on their type (new and existing) and calculat...
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