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

Tags

Tag: test statistic

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? ( 154 )
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 ( 150 )
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? ( 91 )
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 )

A recent article in a computer magazine suggested that the mean time to fully learn a new software p. . . ( 3 )