Gamma Distribution Function

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      ENTER GAMMA CDF ARGUMENTS

          x-value: 
            α: 
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Gamma Probability :

The Gamma distribution with shape parameter α
and scale parameter β is denoted by G(α, β).
The distribution function of the G(α, β)
distribution is denoted by G(x,α,β).
For example, G(1,1,1) = 1 - 1/e = .63212.

The density of the G(α, β) distribution is

f(x) = Γ(α)^-1 β^-α e^-x/β, x^α-1,

on the interval (0,infinity) where Γ(x) reprresents the gamma function.
The G(1,β) distribution is the exponential distribution, E(β).
The sum of k independent E(β) random variables
has distribution G(k,β)