# CHISQ.INV

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 watching television.

## Syntax

``````CHISQ.INV(probability,deg_freedom)
``````

#### Parameters

Term Definition
Probability A probability associated with the chi-squared distribution.
Deg_freedom The number of degrees of freedom.

## Return value

Returns the inverse of the left-tailed probability of the chi-squared distribution.

## Remarks

If argument is nonnumeric, CHISQ.INV returns the #VALUE! error value.

If probability &lt; 0 or probability &gt; 1, CHISQ.INV returns the #NUM! error value.

If deg_freedom is not an integer, it is rounded.

If deg_freedom &lt; 1 or deg_freedom &gt; 10^10, CHISQ.INV returns the #NUM! error value.

## Example

Formula Description Result
=CHISQ.INV(0.93,1) Inverse of the left-tailed probability of the chi-squared distribution for 0.93, using 1 degree of freedom. 5.318520074
=CHISQ.INV(0.6,2) Inverse of the left-tailed probability of the chi-squared distribution for 0.6, using 2 degrees of freedom. 1.832581464