Usability, Customer Experience & Statistics

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 MeasuringU, a company providing statistics and usability consulting to Fortune 1000 companies.
He is the author of over 20 journal articles and 5 books on statistics and the user-experience.
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Posted Comments

There are 2 Comments

February 21, 2016 | yue wrote:

I'm a user from china, the web can not be open sometimes, it made me anxiety for there is a chance i can not use the calculators whenever i want. So my question is do you guys have a stable version like a software of this kind of calculators? Because they are really awesome and i want to use it in further :) looking forward for your reply,thanks!  

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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