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Table 1 Families of T - R { Y } distributions based on different choices for the random variables Y ∗ and T

From: T-normal family of distributions: a new approach to generalize the normal distribution

Y

Q Y ( p)

T

F T ( x) orf T ( x)

(a) Uniform

p

(1) Exponentiated-Exponential

F T (x)= ( 1 - e - λ x ) α

(b) Exponential

-log(1-p)

(2) Weibull

F T (x)=1- e - ( x / γ ) c

(c) Log-logistic

p/(1-p)

(3) Logistic

F T (x)=1- ( 1 + e - λ x ) - 1

(d) Logistic

log(p/(1-p))

(4) Log-logistic

F T (x)=1- [ 1 + ( x / α ) β ] - 1

(e) Extreme value

log(-log(1-p))

(5) Pareto

F T (x)=1- ( α / x ) β

  

(6) Cauchy

f T (x)= { π β ( 1 + [ ( x - α ) / β ] 2 ) } - 1

  

(7) Pascal

f T (x)=0.5λ e - λ | x |

  

(8) Gamma

f T (x)= x α - 1 e - x / β /[ β α Γ(α)]

  1. *standard random variable Y.