The F-Ratio Distribution

If U and V are chi-squared random variables with (Subscript[r, 1]) and (Subscript[r, 2 ])degrees of freedom, then the ratio ((U/(Subscript[r, 1]))/(V/(Subscript[r, 2]))) follows the F-ratio (or F-distribution) with parameters (Subscript[r, 1])and (Subscript[r, 2]).The F-distribution arises in statistical comparisons of the variability in two populations.

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Contributed by: Chris Boucher

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