FINV function
Description
Returns the inverse of the F probability distribution. FINV(p,v1,v2) returns the inverse of the F probability distribution where p is a probability associated with the F cumulative distribution, v1 is the numerator degrees of freedom and v2 is the denominator degrees of freedom.
The argument p can be a real number or a matrix. When it is a matrix, the function returns a matrix with the same dimensions and with the FINV function applied to all elements.