توزیع اف

Also known as Snedecor's F distribution, Fisher-Snedecor distribution, F-ratio, F ratio, F statistic, F value

{(d_1 x+d_2)^{d_1+d_2{x\,\mathrm{B}\!\left(\frac{d_1}{2},\frac{d_2}{2}\right)}\! | cdf = I_{\frac{d_1 x}{d_1 x + d_2 \left(\tfrac{d_1}{2}, \tfrac{d_2}{2} \right) | mean = \frac{d_2}{d_2-2}\! for d2 > 2 | median = | mode = \frac{d_1-2}{d_1}\;\frac{d_2}{d_2+2} for d1 > 2 | variance = \frac{2\,d_2^2\,(d_1+d_2-2)}{d_1 (d_2-2)^2 (d_2-4)}\! for d2 > 4 | skewness = \frac{(2 d_1 + d_2 - 2) \sqrt{8 (d_2-4){(d_2-6) \sqrt{d_1 (d_1 + d_2 -2)\!for d2 > 6 | kurtosis = see text | entropy = \begin{align} & \ln \Gamma{\left(\tfrac{d_1}{2} \right)} + \ln \Gamma{\left(\tfrac{d_2}{2} \right)} - \ln \Gamma{\left