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keisanHigh-precision calculations for everyday life and work

Non-central F Distribution (Percentile)

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Calculate the percentile based on the lower or upper cumulative probability value of the non-central F distribution.
Cumulative Mode
Cumulative Probability
0≦P,Q≦1
Numerator degrees of freedom ν1
ν1>0
Degrees of freedom in the denominator ν2
ν2>0
Noncentrality parameter λ
λ≧0
・If λ = 0, the distribution becomes F.

\(\normalsize Noncentral\ F{\tiny-}distribution\ F(x,\nu_{1},\nu_{2},\lambda)\\ (1) probability\ density\\ f(x,\nu_1,\nu_2,\lambda){\small=}{\large\displaystyle \sum_{\small j=0}^{\small\infty} \frac{e^{-\frac{\lambda}{2}} (\frac{\lambda}{2})^j {\nu_{\tiny j}}^{\frac{\nu_{\tiny j}}{2}}{\nu_2}^{\frac{\nu_2}{2}} x^{\frac{\nu_{\tiny j}}{2}-1}}{j!B(\frac{\nu_{\tiny j}}{2},\frac{\nu_2}{2}) (\nu_2+\nu_{\tiny j}x)^{\frac{\nu_{\tiny j}+\nu_2}{2}}} }\\ \hspace{80px}\nu_j=\nu_1+2j\\ (2) lower\ cumulative\ distribution\\ \hspace{30px}P(x,\nu_1,\nu_2,\lambda)={\large\int_{\small 0}^{\small x}}f(t,\nu_1,\nu_2,\lambda)dt\\ (3) upper\ cumulative\ distribution\\ \hspace{30px}Q(x,\nu_1,\nu_2,\lambda)={\large\int_{\small x}^{\small\infty}}f(t,\nu_1,\nu_2,\lambda)dt\\\)

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