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Table 1 Selected Extensions of the Generalized Gamma Distribution

From: Describing the Flexibility of the Generalized Gamma and Related Distributions

Distribution

CDF

Additional parameters

Generalized Gamma

F GG (t)

n/a

Beta GG

\( {F}_{BGG}(t)={F}_B\left({F}_{GG}(t)\right)=\frac{B\left({F}_{GG}(t);\theta, \tau \right)}{B\left(\theta, \tau \right)} \)

θ > 0 , τ > 0

Kumaraswamy GG

F KGG (t) = 1 − (1 − F GG (t)λ)φ

λ > 0 , φ > 0

Transmuted GG

F TGG (t) = (1 + λ)F GG (t) − λF GG (t)2

−1 ≤ λ ≤ 1

Marshall-Olkin GG

\( {F}_{MOGG}(t)=1-\frac{\alpha \left(1-{F}_{GG}(t)\right)}{1-\left(1-\alpha \right)\left(1-{F}_{GG}(t)\right)} \)

α > 0