Measuring Usability: Quantitative Usability, Statistics and Six-Sigma

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Task Times in Formative Usability Tests ( 166 )
Time-on-task can be used as a valuable diagnosis and comparative tool during formative evaluations.

Questions

The following questions have the tag Type I Error associated with them. The number of users that have also tagged the question ' Type I Error ' is in parenthesis.

For each of the following situations, indicate whether an error has occurred and, if so, indicate wh. . . ( 4 )

Why should you use ANOVA instead of several t tests to evaluate mean differences when an experiment . . . ( 5 )