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

Tags

Tag: Variance

Pages

The following pages have the tag Variance associated with them. The number of users that have also tagged the page ' Variance ' is in parenthesis.

How Do You Calculate a Z-Score/ Sigma Level? ( 150 )
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 Variance associated with them. The number of users that have also tagged the question ' Variance ' is in parenthesis.

A telescope manufacturer wants its telescopes to have standard deviations in resolution to be signif. . . ( 4 )