F distribution

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F distribution

[′ef ‚dis·trə‚byü·shən]
(statistics)
The ratio of two independent chi-square variables each divided by its degree of freedom; used to test hypotheses in the analysis of variance and hypotheses about whether or not two normal populations have the same variance.
References in periodicals archive ?
If the hypothesis that the four industries have the same elasticities is true, then the traditional test statistic involved has F-distribution with degrees of freedom 6 and 50.
3]) for their indirect forms (8) is true, then the appropriate test statistic has F-distribution with degrees of freedom 6 and 30, respectively.
Given that the random errors in the indirect forms (12) have the same variances for all industries, the appropriate test statistic has F-distribution with degrees of freedom 9 and 26.