Measuring Usability
Quantitative Usability, Statistics & Six Sigma by Jeff Sauro

Compare 2 Small Sample Completion Rates (Fisher Exact Test)

Jeff Sauro • June 5, 2009

Use this calculator to determine if there is a significant difference between 2 small sample completion rates.
SuccessesTotal
Group 1
Group 2

Two Tailed p-value: One Tailed p-value:

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About Jeff Sauro

Jeff Sauro is the founding principal of Measuring Usability LLC, a company providing statistics and usability consulting to Fortune 1000 companies.
He is the author of over 20 journal articles and 4 books on statistics and the user-experience.
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Posted Comments

There are 1 Comments

November 7, 2013 | Heather Kauth wrote:

I think your calculator is broken. Isn't fisher's exact supposed to be usable for sparse data? I got the same p values and % likelihood no matter what value I put in.  


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Jeff's Books

Quantifying the User Experience: Practical Statistics for User ResearchQuantifying the User Experience: Practical Statistics for User Research

The most comprehensive statistical resource for UX Professionals

Buy on Amazon

Excel & R Companion to Quantifying the User ExperienceExcel & R Companion to Quantifying the User Experience

Detailed Steps to Solve over 100 Examples and Exercises in the Excel Calculator and R

Buy on Amazon | Download

A Practical Guide to the System Usability ScaleA Practical Guide to the System Usability Scale

Background, Benchmarks & Best Practices for the most popular usability questionnaire

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A Practical Guide to Measuring UsabilityA Practical Guide to Measuring Usability

72 Answers to the Most Common Questions about Quantifying the Usability of Websites and Software

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