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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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9 questions
Sample size for a 2% lift
Compute the per-arm sample size for a conversion test.
Calculation · Design · 8 min · Medium
Experimentation & A/B Testing · Original Uplift question
ROAS looks great, is the campaign profitable
A campaign spent $10,000 and drove $40,000 in revenue (ROAS = 4).
Calculation · Campaigns · 6 min · Medium
Digital & Marketing Analytics · Company-context scenario
Sample size for a 1-point conversion lift
Baseline conversion is 10%.
Calculation · Design · 8 min · Medium
Experimentation & A/B Testing · Original Uplift question
False-positive risk with four variants
ProYou run one control against four independent treatment variants, testing each at α = 0.05.
Calculation · Multiple testing · 6 min · Medium
Experimentation & A/B Testing · Reported interview question
Two children, at least one boy
ProA family has two children.
Calculation · Probability puzzles · 6 min · Medium
Statistics & Inference · Company-context scenario
Is 550 heads in 1,000 flips suspicious?
A coin is flipped 1,000 times and lands heads 550 times.
Calculation · Intervals · 10 min · Medium
Statistics & Inference · Reported at D. E. Shaw
Positive predictive value of a screening test
A condition affects 1% of a population.
Calculation · Probability puzzles · 10 min · Medium
Statistics & Inference · Reported interview question
Expected cost of an agent routing policy
ProAn agent handles 10,000 tasks per month.
Calculation · Product metrics · 12 min · Medium
AI Agents & Automation · Reported interview question
False-positive risk across four variants
You compare four independent treatment variants with one control.
Calculation · Design · 10 min · Medium
Experimentation & A/B Testing · Reported interview question