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UX Research
Sample Sizing & Statistical Foundations — Quiz
5 questions
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Question 1 of 5
Sample Sizing & Statistical Foundations
A UX team wants to benchmark their checkout task success rate with 95% confidence and a ±10% margin of error. Their best estimate is that roughly half of users succeed. Approximately how many participants do they need?
5 participants — the 5-user rule covers this type of study
20 participants — sufficient for all quantitative UX benchmarks
96 participants — derived from the standard proportion formula at 95% confidence and ±10% margin
384 participants — required for any survey regardless of margin of error
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