Гамма тархалт
Gamma Distribution Function
JavaScriptThe Gamma distribution with shape parameter alpha
and scale parameter beta is denoted by G(alpha,beta).
The distribution function of the G(alpha, beta)
distribution is denoted by G(x,alpha,beta).
For example, G(1,1,1) = 1 - 1/e = .63212.
The density of the G(alpha,beta) distribution is
f(x) = G(alpha)-1 beta-alpha e-x/beta, xalpha-1,
on the interval (0,infinity) where G(x) reprresents the gamma function.
The G(1,beta) distribution is the exponential distribution, E(beta).
The sum of k independent E(beta) random variables
has distribution G(k,beta)