The CHISQ.INV function returns the inverse of the left-tailed probability of the chi-squared distribution. The chi-squared distribution is commonly used to study variation in the percentage of something across samples, such as the fraction of the day people spend driving cars.

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

Syntax: CHISQ.INV(probability, deg_freedom)

#1)
Using the CHISQ.INV function:
#2)
The arguments for the CHISQ.INV function are:
Argument Required? Description
probability Required A probability associated with the chi-squared distribution.
deg_freedom Required The number of degrees of freedom.
#3)
A few more things:
If argument is nonnumeric, CHISQ.INV returns the #VALUE! error value.
If probability < 0 or probability > 1, CHISQ.INV returns the #NUM! error value.
If deg_freedom is not an integer, it is truncated.
If deg_freedom < 1 or deg_freedom > 10^10, CHISQ.INV returns the #NUM! error value.

Summary

The CHISQ.INV function returns the inverse of the left-tailed probability of the chi-squared distribution. The chi-squared distribution is commonly used to study variation in the percentage of something across samples, such as the fraction of the day people spend driving cars.
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