# CHIINV

CHIINV(probability, degrees_freedom)

Returns the inverse of the probability distribution function for a chi-squared distribution (right tailed).

 probability The probability associated with the distribution. degrees_freedom The number of degrees of freedom.

 REMARKS
 * CHISQ.INV.RT was added in Excel 2010 to replace this function.* The chi-squared distribution is a continuous distribution* 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_freedom" is not an integer, it is truncated.* If "degrees_freedom" < 1, then #NUM! is returned.* If "degrees_freedom" = 10^10, then #NUM! is returned.* If "degrees_freedom" is not numeric, then #VALUE! is returned.* This function iterates until the result is accurate to within ±3x10^-7.* If the iterative process does not converge after 100 iterations, then #N/A is returned.* You can use the CHISQ.DIST function to return the probability distribution function OR the cumulative probability function for a chi-squared distribution (left tailed).* You can use the CHISQ.DIST.RT function to return the probability distribution function for a chi-squared distribution (right tailed) (no cumulative).* You can use the CHISQ.INV function to return the inverse of the probability distribution function for a chi-squared distribution (left tailed).* You can use the CHISQ.TEST function to return the probability value from a chi-squared distribution.* For the Microsoft documentation refer to support.microsoft.com* For the Google documentation refer to support.google.com

 A 1 =CHIINV(0.5, 2) = 1.39 2 =CHIINV(0.05, 10) = 18.307 3 =CHIINV(0.05, 10^10) = #NUM! 4 =CHIINV(1.01, 10) = #NUM! 5 =CHIINV("some text", 10) = #VALUE! 6 =CHIINV(0.5, "some text") = #VALUE!