11 citations · 46 across the 22 of their papers we have counts for
7 papers · 2 filters
The Beta-Gompertz Distribution
Ali Akbar Jafari, Saeid Tahmasebi, Morad Alizadeh
In this paper, we introduce a new four-parameter generalized version of the Gompertz model which is called Beta-Gompertz (BG) distribution. It includes some well-known lifetime dis…
Inference on Difference of Means of two Log-Normal Distributions; A Generalized Approach
Kamel Abdollahnezhad, M. Babanezhad, Ali Akbar Jafari
Over the past decades, various methods for comparing the means of two log-normal have been proposed. Some of them are differing in terms of how the statistic test adjust to accept…
Inference on P(Y<X) in Bivariate Rayleigh Distribution
Abbas Pak, Nayereh Bagheri Khoolenjani, Ali Akbar Jafari
This paper deals with the estimation of reliability when is a random strength of a component subjected to a random stress and follows a bivariate Rayleig…
Estimators for the Parameter Mean of Morgenstern Type Bivariate Generalized Exponential Distribution Using Ranked Set Sampling
Saeid Tahmasebi, Ali Akbar Jafari
In situations where the sampling units in a study can be more easily ranked based on the measurement of an auxiliary variable, ranked set sampling provide unbiased estimators for t…
On confidence intervals for the power of F-tests
Ali Akbar Jafari, Abdollreza Bazargan-Lari, Mingfei
This note points out how confidence interval estimates for standard deviation transform into confidence interval estimates for the power of F-tests at fixed alternative means. An a…
Generalized inference for the common mean of several lognormal populations
Javad Behboodian, Ali Akbar Jafari
A hypothesis testing and an interval estimation are studied for the common mean of several lognormal populations. Two methods are given based on the concept of generalized p-value…