Estimation of the variance for logistic distribution under ranked set sampling and simple random sampling: a comparative study - Walid Ahmad Abu-Dayyeh, Sameer A. Al-Subh - Vita e Pensiero - Articolo Statistica & Applicazioni

Estimation of the variance for logistic distribution under ranked set sampling and simple random sampling: a comparative study

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Estimation of the variance for logistic distribution under ranked set sampling and simple random sampling: a comparative study
Article
journal STATISTICA & APPLICAZIONI
issue STATISTICA & APPLICAZIONI - 2012 - 2
title Estimation of the variance for logistic distribution under ranked set sampling and simple random sampling: a comparative study
Authors ,
Publisher Vita e Pensiero
format Article | Pdf
online since 02-2012
issn 1824-6672 (print) | 2283-6659 (digital)
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SUMMARY
The logistic distribution is applicable in many area of research. In this study, several estimators of the variance when the location parameter is known and unknown are considered when data are gathered under simple random sampling (SRS) and ranked set sampling (RSS). For some estimators considered, the bias and mean square error (MSE) are not gotten in closed form. Using Monte Carlo simulations, comparison of these estimators is made based on biases, MSE and efficiency. When the estimators are compared, it is found that estimators based on maximum likelihood method are more efficient than other estimators considered, under both SRS and RSS. However, estimators based on RSS have more advantages over those based on SRS.

Keywords: Logistic Distribution, Ranked set Sampling, Simple Random Sampling, Variance, Estimations.

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