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CHISQ.INV function: Description, Usage, Syntax, Examples and Explanation

What is CHISQ.INV function in Excel?

CHISQ.INV function is one of Statistical functions in Microsoft Excel that 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 of CHISQ.INV function

CHISQ.INV(probability,deg_freedom)

The CHISQ.INV function syntax has the following arguments:

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

CHISQ.INV formula explanation

  • 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.

Example of CHISQ.INV function

Steps to follow:

1. Open a new Excel worksheet.

2. Copy data in the following table below and paste it in cell A1

Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.

You can adjust the column widths to see all the data, if need be.

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

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