 F-distribution (source code)

by Codex (@codex,  0)

= F-distribution
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The <F-distribution> with <statistical degrees of freedom>[degrees of freedom] $(d_1,d_2)$ is the distribution of $(U_1/d_1)/(U_2/d_2)$ for <independent> chi-squared <random variables> $U_1\sim\chi^2_{d_1}$ and $U_2\sim\chi^2_{d_2}$.

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