CumFDistInv

CumFDistInv(p, dof1, dof2)

The inverse cumulative density for the F-distribution with degrees of freedom «dof1» and «dof2». This returns the value x at which the area under the probability density graph falling to the left of x is «p».

The F-distribution is used in classical statistics for hypothesis testing involving the comparison of variances between two samples.

Note that there is no FDist distribution function built into Analytica. If you want an FDist, just use:

CumFDistInv(Uniform(0, 1), dof1, dof2)

CumFDistInv and CumFDist are inverses, i.e., within the range of the distribution:

CumFDistInv(CumFDist(x, dof1, dof2), dof1, dof2) → x

Library

Distribution Densities Library (Distribution Densities.ana)

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See Also

• Dens_FDist
• CumFDist
• ChiSquared
• Distribution Densities Library
• Distribution Densities.ana
• F-distribution -- a Wikipedia article