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.
Group 1
Group 2

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


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

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

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

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A Practical Guide to Measuring UsabilityA Practical Guide to Measuring Usability

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