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8 branches of analytics, product and AI interview questions
Explore eight skill tracks, called branches, filterable by subtopic, company, tool and difficulty. SQL questions run against sample tables, choice and numeric answers are checked instantly, and written cases are scored against evaluation criteria.
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6 questions
Effect of halving the MDE
Reason about the sample size / MDE relationship.
Calculation · Intervals · 5 min · Easy
Statistics & Inference · Original Uplift question
What the Central Limit Theorem lets you do
Why does the Central Limit Theorem matter for A/B testing, where the underlying metric (e.g.
Quick check · Foundations · 6 min · Easy
Statistics & Inference · Company-context scenario
Type I vs Type II error trade-off
A medical screening test is being tuned.
Quick check · Intervals · 5 min · Easy
Statistics & Inference · Company-context scenario
The returning-planes problem
In WWII, analysts studied bullet holes on planes that RETURNED from missions and proposed armoring the most-hit areas.
Quick check · Bias · 5 min · Easy
Statistics & Inference · Company-context scenario
When the mean misleads
You report 'average revenue per user = $50' but leadership is confused because almost no one spends near $50.
Quick check · Descriptive stats · 5 min · Easy
Statistics & Inference · Company-context scenario
Control four confirmatory tests
A product experiment has four equally important confirmatory metrics.
Quick check · Intervals · 7 min · Easy
Statistics & Inference · Reported interview question