The CHISQ.INV.RT function returns the inverse of the right-tailed probability of the chi-squared distribution. If probability = CHISQ.DIST.RT(x),...), then CHISQ.INV.RT(probability,...) = x. Use this function to compare observed results with expected ones in order to decide whether your original hypothesis is valid.

CHISQ.INV.RT takes 2 required arguments and no optional arguments:

Syntax: CHISQ.INV.RT(probability, deg_freedom) ##### Using the CHISQ.INV.RT function:   The arguments for the CHISQ.INV.RT function are:
Argument Required? Description
probability Required A probability associated with the chi-squared distribution.
deg_freedom Required The number of degrees of freedom. ##### A few more things:
 • If either argument is nonnumeric, CHISQ.INV.RT returns the #VALUE! error value. • If probability < 0 or probability > 1, CHISQ.INV.RT returns the #NUM! error value. • If deg_freedom is not an integer, it is truncated. • If deg_freedom < 1, CHISQ.INV.RT returns the #NUM! error value. • Given a value for probability, CHISQ.INV.RT seeks that value x such that CHISQ.DIST.RT(x, deg_freedom) = probability. Thus, precision of CHISQ.INV.RT depends on precision of CHISQ.DIST.RT. CHISQ.INV.RT uses an iterative search technique. If the search has not converged after 64 iterations, the function returns the #N/A error value.

### Summary

The CHISQ.INV.RT function returns the inverse of the right-tailed probability of the chi-squared distribution.