Measuring Usability: Quantitative Usability, Statistics and Six-Sigma

Pages

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

SUM: Single Usability Metric ( 211 )
(Presented at CHI 2005)SUM is a single usability metric that summarize the majority of variation in four common summative usability metrics. Download the calculator to convert raw metrics to a SUM score or read the CHI paper which explains the theoretical foundations.

Questions

The following questions have the tag Z-Statistic associated with them. The number of users that have also tagged the question ' Z-Statistic ' is in parenthesis.

A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assum. . . ( 4 )

Various temperature measurements are recorded at different times for a particular city. The mean of . . . ( 4 )

What constitutes a small sample size in a test of two populations? . . . ( 5 )