Startseite A new generalized Lindley-Weibull class of distributions: Theory, properties and applications
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A new generalized Lindley-Weibull class of distributions: Theory, properties and applications

  • Boikanyo Makubate , Thatayaone Moakofi EMAIL logo und Broderick Oluyede
Veröffentlicht/Copyright: 29. Januar 2021
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Abstract

We propose a new generalized class of distributions called Lindley-Weibull Power Series (LWPS) distributions and their special case called Lindley-Weibull logarithmic (LWL) distributions. Structural properties of the LWPS class of distributions and its sub-model LWL distribution including moments, order statistics, Rényi entropy, mean and median deviations, Bonferroni and Lorenz curves, and maximum likelihood estimates are derived. A simulation study to examine the bias and mean square error of the maximum likelihood estimators for each parameter is presented. Finally, real data examples are presented to illustrate the applicability and usefulness of the proposed class of distributions.

MSC 2010: 60E05; 62F10
  1. (Communicated by Gejza Wimmer )

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Appendix A

The elements of the score vector are given by

β=αi=1nxiβlnxi+i=1nα(1+λ+λxi)xiβ1(1+βlnxi)λ2(1+xi)+(1+λ+λxi)αβxiβ1+i=1nCθ11+λ+λxi1+λeλxiαxiβCθ11+λ+λxi1+λeλxiαxiβθ1+λ+λxi1+λeλxiαxiβαxiβlnxi,θ=nθnC(θ)C(θ)+i=1nCθ11+λ+λxi1+λeλxiαxiβCθ11+λ+λxi1+λeλxiαxiβ×11+λ+λxi1+λeλxiαxiβ,α=i=1nxiβ+i=1n(1+λ+λxi)(βxiβ1)λ2(1+xi)+(1+λ+λxi)αβxiβ1+i=1nCθ11+λ+λxi1+λeλxiαxiβCθ11+λ+λxi1+λeλxiαxiβθ1+λ+λxi1+λeλxiαxiβxiβ,

and

λ=nxi+i=1n2λ(1+xi)+(1+xi)αβxiβ1λ2(1+xi)+(1+λ+λxi)αβxiβ1+(i=1nCθ11+λ+λxi1+λeλxiαxiβCθ11+λ+λxi1+λeλxiαxiβ×θeλxiαxiβxi1+λ+λxi1+λ(1+λ)(1+xi)(1+λ+λxi)(1+λ)2).
Received: 2019-12-12
Accepted: 2020-06-01
Published Online: 2021-01-29
Published in Print: 2021-02-23

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