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Description: Returns the inverse of the gamma cumulative distribution. If p = GAMMADIST(x,...), then GAMMAINV(p,...) = x. You can use this function to study a variable whose distribution may be skewed.
Syntax: GAMMAINV(Probability, Alpha, Beta)
Probability is the probability associated with the gamma distribution.
Alpha is a parameter to the distribution.
Beta is a parameter to the distribution. If Beta = 1, GAMMAINV returns the standard gamma distribution.
Remarks:
All arguments must be numerical.
Probability must be => 0 and <= 1.
Alpha and Beta must be greater than 1.
When used in a RENO flowchart, the parameters must evaluate to numerical values. They can include:
Numerical values
Standard operands (+, -, *, /)
Predefined mathematical functions (exp, log, sin, etc.)
References to any Synthesis Workbooks
Example:
GAMMAINV(0.068094,9,2) = 10
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