CHISQ.INV.RT Function

Basic Description

The Excel Chisq.Inv.Rt function calculates the inverse of the right-tailed probability of the chi-square distribution. The function is new in Excel 2010 and so is not available in earlier versions of Excel. However, the Chisq.Inv.Rt function is simply a new version of the Chiinv function that is available in earlier versions of Excel.

Syntax: CHISQ.INV.RT( probability, degrees_freedom )

Where the function arguments are:

probability The probability of the right-tailed chi-square distribution, for which you want to find the value of x
degrees_freedom The number of degrees of freedom (must be an integer between 1 and 1010)

(If the supplied degrees_freedom is a decimal, this is truncated to an integer)

 

Chisq.Inv.Rt Function Examples

The spreadsheets below show examples of the Excel Chisq.Inv.Rt function, used to calculate the inverse of the right-tailed chi-square distribution for different probability values, and different degrees of freedom. The spreadsheet on the left shows the formulas and the spreadsheet on the right shows the results.

 Formulas:

Examples of use of the Excel Chisq.Inv.Rt Function

 Results:

Excel Chisq.Inv.Rt Function Results

 

Chisq.Inv.Rt Function Errors

If you get an error from the Excel Chisq.Inv.Rt function this is likely to be one of the following :

#NUM! Occurs if either the supplied probability value is ≤ 0 or > 1 or the supplied degrees_freedom argument is <1 or >1010
#VALUE! Occurs if either of the supplied arguments are not recognised as numeric values

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