2025 : 10 : 11
Ghobad Saadatkia

Ghobad Saadatkia

Academic rank: Associate Professor
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Education: PhD.
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Faculty: Basic and Applied Sciences
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Research

Title
Dispersion and variation orders of extreme order statistics from dependent unit gamma Gompertz random variables
Type
JournalPaper
Keywords
Archimedean Copula; Dispersive Order; Star Order; Unit Gamma Gompertz Model; Majorization Order
Year
2025
Journal Journal of Inequalities and Applications
DOI
Researchers Marzieh Shekari ، Zahra Pakdaman ، Ghobad Saadatkia ، Narayanaswamy Balakrishnan

Abstract

Dispersive order is used to compare the variability in probability distributions, while star order is used to compare the skewness of probability distributions. In this paper, we discuss dispersive and star orders of the smallest and largest order statistics from dependent unit gamma Gompertz random variables. We also use the Archimedean copula for representing the joint distribution of the underlying random variables. Several numerical examples are presented in order to illustrate all the results established here.