Definition of gamma distribution in English:

gamma distribution

noun

  • A continuous statistical distribution of two parameters α and β of which the chi-squared and exponential distributions are special cases, given by f(x) = βα x α−1 e −βx/Γ(α), for x, α, β all positive, where Γ is the gamma function.

Origin

1930s; earliest use found in Annals of Mathematical Statistics.