Tags
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Pages
The following pages have the tag test statistic associated with them. The number of users that have also tagged the page ' test statistic ' is in parenthesis.What's a Z-Score and Why Use it in Usability Testing? ( 128 )
This common statistical way of describing data can be used in usability testing to standardize disparate data types to allow easy comparison between products or versions and providing a universal way of assessing quality.
Confidence Interval Calculator for a Completion Rate ( 123 )
If you've wanted to provide a confidence interval around a small sample completion rate but just didn't have time to do the math, this calculator does the work for you.
How Do You Calculate a Z-Score/ Sigma Level? ( 64 )
The basics of z-scores are discussed plus an example of raw usability data converted into z-scores including three of Nielsen's five usability attributes.
Questions
The following questions have the tag test statistic associated with them. The number of users that have also tagged the question ' test statistic ' is in parenthesis.In general, what is a “Critical Value” or “Cut-Off Score” of a test statistic. . . ( 1 )