FINV

FINV(probability, degrees_freedom1, degrees_freedom2)

Returns the inverse of the probability distribution function for an f distribution (left tailed).

 probability The probability associated with this distribution. degrees_freedom1 The numerator degrees of freedom. degrees_freedom2 The denominator degrees of freedom.

 REMARKS
 * F.INV.RT was added in Excel 2010 to replace this function.* The f distribution is a [[continuous distribution]].* The random variable returned by this function is often referred to as a critical value.* If "probability" < 0, then #NUM! is returned.* If "probability" > 1, then #NUM! is returned.* If "probability" is not numeric, then #VALUE! is returned.* If "degrees_freedom1" < 1, then #NUM! is returned.* If "degrees_freedom1" = 10^10, then #NUM! is returned.* If "degrees_freedom1" is not an integer, it is truncated.* If "degrees_freedom1" is not numeric, then #VALUE! is returned.* If "degrees_freedom2" < 1, then #NUM! is returned.* If "degrees_freedom2" = 10^10, then #NUM! is returned.* If "degrees_freedom2" is not an integer, it is truncated.* If "degrees_freedom2" is not numeric, then #VALUE! is returned.* If this function does not converge after 100 iterations, then #N/A is returned.* For the Microsoft documentation refer to support.microsoft.com

 A 1 =FINV(0.01, 6, 4) = 15.207 2 =FINV(0.5, 1, 2) = 0.667 3 =FINV(0.5, 1, 1) = 1 4 =FINV(FDIST(15.207, 6, 4), 6, 4) = 15.207 5 =FINV(0.5, 1, -2) = #NUM! 6 =FINV(0.5, -1, 2) = #NUM! 7 =FINV(0.5, "some text", 2) = #VALUE!