WorksheetFunction.ChiDist Method
Returns the one-tailed probability of the chi-squared distribution.
Namespace: Microsoft.Office.Interop.Excel
Assembly: Microsoft.Office.Interop.Excel (in Microsoft.Office.Interop.Excel.dll)
Syntax
'Declaration
Function ChiDist ( _
Arg1 As Double, _
Arg2 As Double _
) As Double
'Usage
Dim instance As WorksheetFunction
Dim Arg1 As Double
Dim Arg2 As Double
Dim returnValue As Double
returnValue = instance.ChiDist(Arg1, Arg2)
double ChiDist(
double Arg1,
double Arg2
)
Parameters
Arg1
Type: System.DoubleThe value at which you want to evaluate the distribution.
Arg2
Type: System.DoubleThe number of degrees of freedom.
Return Value
Type: System.Double
Remarks
Important
This function has been replaced with one or more new functions that may provide improved accuracy and whose names better reflect their usage. This function is still available for compatibility with earlier versions of Excel. However, if backward compatibility is not required, you should consider using the new functions from now on, because they more accurately describe their functionality. For more information about the new functions, see the ChiSq_Dist_RT(Double, Double) and ChiSq_Dist(Double, Double, Boolean) methods.
The χ2 distribution is associated with a χ2 test. Use the χ2 test to compare observed and expected values.
For example, a genetic experiment might hypothesize that the next generation of plants will exhibit a certain set of colors. By comparing the observed results with the expected ones, you can decide whether your original hypothesis is valid.
If either argument is nonnumeric, ChiDist generates an error.
If x is negative, ChiDist generates an error.
If degrees_freedom is not an integer, it is truncated.
If degrees_freedom < 1 or degrees_freedom > 10^10, ChiDist generates an error.
ChiDist is calculated as ChiDist = P(X>x), where X is a χ2 random variable.