# F-test

(redirected from*F-test statistic*)

Also found in: Wikipedia.

## F-test

Etymology: Sir Ronald Aylmer

*Fisher,*British statistician, 1890-1962a statistical test comparing the means of more than two groups simultaneously by comparing two different measures of variance of the observations. One statistic measures the variations between the means of the groups (the between-groups variation), the other the variations within the groups (the within-group variation). If the two measures of variance yield similar results and their ratio, the

*F-*ratio, approximates 1.0, the null hypothesis that all observations came from the same population cannot be rejected, whereas under the alternative hypothesis, the*F-*ratio is expected to be larger than 1.0. The test is the first step in the analysis of variance.Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

Link to this page: