The inverse of the Gamma Cumulative Distribution is returned by the Excel Gamma.Inv function. Because the function is new in Excel 2010, it is not available in previous versions of Excel. The Gamma.Inv function, on the other hand, is merely a new version of the Gammainv function, which was accessible in prior versions of Excel.
Syntax :
=GAMMA.INV( probability, alpha, beta )
Parameters :
The following parameters are :
Example :
The graphs below depict the Gamma Cumulative Distribution and the Inverse Gamma Cumulative Distribution, with alpha = 3 and beta = 2. For a given probability, the Excel Gamma.Inv function may be used to determine the value of the Inverse Gamma Cumulative Distribution function. For example, for a probability of 0.5, the function is: =GAMMA.INV(0.5, 3, 2), yielding the value 5.348120627.
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