In Excel 2010, the Chidist function has been renamed the Chisq.Dist.Rt function.
The Excel Chidist function calculates the right-tailed probability of the chi-square distribution
The syntax of the function is :
|x||-||The value at which the chi-square distribution is to be evaluated (must be ≥ 0)|
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)
The chart on the right shows the right-tailed chi-square distribution, with 1, 2 and 3 degrees of freedom.
The value of any of these functions, at a specified value of x can be calculated using the Excel Chidist function. This is shown in the spreadsheets below:
Further examples of the Excel Chidist function can be found on the Microsoft Office website.
If you get an error from the Excel Chidist function this is likely to be one of the following :
Occurs if either:
|#VALUE!||-||Occurs if either of the supplied arguments are not recognised as numeric values|