WorksheetFunction.ChiInv Method
Returns the inverse of the one-tailed probability of the chi-squared distribution.
Syntax
expression.ChiInv(Arg1, Arg2)
expression A variable that represents a WorksheetFunction object.
Parameters
| Name | Required/Optional | Data Type | Description |
|---|---|---|---|
| Arg1 | Required | Double | A probability associated with the chi-squared distribution. |
| Arg2 | Required | Double | The number of degrees of freedom. |
Return Value
Double
Remarks
If probability = ChiDist(x,...), then ChiInv(probability,...) = x. Use this function to compare observed results with expected ones in order to decide whether your original hypothesis is valid.
- If either argument is nonnumeric, ChiInv generates an error.
- If probability < 0 or probability > 1, ChiInv generates an error.
- If degrees_freedom is not an integer, it is truncated.
- If degrees_freedom < 1 or degrees_freedom ≥ 10^10, ChiInv generates an error.
Given a value for probability, ChiInv seeks that value x such that ChiDist(x, degrees_freedom) = probability. Thus, precision of ChiInv depends on precision of ChiDist. ChiInv uses an iterative search technique. If the search has not converged after 100 iterations, the function generates an error.