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

One Sample Proportion Calculator

Jeff Sauro • May 30, 2008

Use this calculator to generate both a one-sample confidence interval and to test against a critera or benchmark.



# PassedTotal Tested Test Proportion

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Posted Comments

There are 6 Comments

January 8, 2010 | Bert wrote:

This page could use some explanation. 


June 11, 2008 | John Romadka wrote:

Sorry, I meant to "ask" if you could state results in a little more client friendly way like: "You can report that: Based on your target goal of X%, we can be Y% certain that the completion rate (of the that user group or population) is >Z%. 


June 11, 2008 | John Romadka wrote:

"You can report that: Based on your target goal of X%, we can be Y% certain that the completion rate (of the that user group or population) is >Z%. 


June 11, 2008 | JohnRomadka wrote:

I didn't initially get where/what (in the results text) the observed proportion= "x" was. Meaning, if 5 of 10, it would have said "0.5". Could it also say in parens (50%)? 


June 11, 2008 | John Romadka wrote:

I'm not sure what the "Is Greater than" is for, or if/when I should change it. 


June 11, 2008 | John Romadka wrote:

Is "Test Proportion" the same thing as "Acceptable Minimum Completion Rate". If so, that might make more sense (to non-statistically minded folks). 


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