Returns the inverse of the one-tailed probability of the chi-squared distribution. If probability = CHIDIST(x,...), then CHIINV(probability,...) = x. Use this function to compare observed results with expected ones to decide whether your original hypothesis is valid.
Syntax
CHIINV(probability,degrees_freedom)
Probability is a probability associated with the chi-squared distribution.
Degrees_freedom is the number of degrees of freedom.
Remarks
CHIINV uses an iterative technique for calculating the function. Given a probability value, CHIINV iterates until the result is accurate to within ± 3x10^-7. If CHIINV does not converge after 100 iterations, the function returns the #N/A error value.
Example
The example may be easier to understand if you copy it to a blank spreadsheet.
Selecting an example from Help
Data | Description |
---|---|
0.05 | Probability associated with the chi-squared distribution |
10 | Degrees of freedom |
Formula | Description (Result) |
=CHIINV(A2,A3) | Inverse of the one-tailed probability of the chi-squared distribution (18.30703) |