GammaDist() returns the accumulated probability of the Gamma distribution.
Syntax:
GammaDist(value, k, θ)
Return data type: number
| Argument | Description | 
|---|---|
| value | The value at which you want to evaluate the distribution. The value must not be negative. | 
| k | A positive number defining the shape parameter. | 
| θ | A positive number defining the scale parameter. | 
This function is related 
			to the GammaINV function in the following way: 
If prob = GammaDist(value, k, θ), then GammaInv(prob, k, θ) = value