GAMMA.INV function: Description, Usage, Syntax, Examples and Explanation
What is GAMMA.INV function in Excel?
Syntax of GAMMA.INV function
GAMMA.INV(probability,alpha,beta)
The GAMMA.INV function syntax has the following arguments:
- Probability Required. The probability associated with the gamma distribution.
- Alpha Required. A parameter to the distribution.
- Beta Required. A parameter to the distribution. If beta = 1, GAMMA.INV returns the standard gamma distribution.
GAMMA.INV formula explanation
- If any argument is text, GAMMA.INV returns the #VALUE! error value.
- If probability < 0 or probability > 1, GAMMA.INV returns the #NUM! error value.
- If alpha ≤ 0 or if beta ≤ 0, GAMMA.INV returns the #NUM! error value.
Given a value for probability, GAMMA.INV seeks that value x such that GAMMA.DIST(x, alpha, beta, TRUE) = probability. Thus, precision of GAMMA.INV depends on precision of GAMMA.DIST. GAMMA.INV uses an iterative search technique. If the search has not converged after 64 iterations, the function returns the #N/A error value.
Example of GAMMA.INV function
Steps to follow:
1. Open a new Excel worksheet.
2. Copy data in the following table below and paste it in cell A1
Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.
You can adjust the column widths to see all the data, if need be.
Data | Description | |
0.068094 | Probability associated with the gamma distribution | |
9 | Alpha parameter to the distribution | |
2 | Beta parameter to the distribution | |
Formula | Description | Result |
=GAMMA.INV(A2,A3,A4) | Inverse of the gamma cumulative distribution for the probability, alpha, and beta arguments in A2, A3, and A4. | 10.0000112 |