Returns a quantile from the F distribution.

Category: | Quantile |

The FINV function returns
the p^{th} quantile from the F distribution
with numerator degrees of freedom ndf, denominator degrees of freedom ddf, and noncentrality parameter nc. The probability that an observation from the F distribution is less than the quantile is p. This function accepts noninteger degrees of
freedom parameters ndf and ddf.

If the optional parameter nc is not specified or has the value 0, the quantile
from the central F distribution
is returned. The noncentrality parameter nc is defined such that if X and Y are normal random variables with
means μ and 0, respectively,
and variance 1, then
${X}^{2}/{Y}^{2}$ has a noncentral F distribution with nc = μ^{2}.

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