- Hacettepe Journal of Mathematics and Statistics
- Vol: 45 Issue: 3
- A class of Hartley-Ross type unbiased estimators for population mean using ranked set sampling
A class of Hartley-Ross type unbiased estimators for population mean using ranked set sampling
Authors : Lakhkar Khan, Javid Shabbir
Pages : 917-928
View : 13 | Download : 3
Publication Date : 2016-06-01
Article Type : Research
Abstract :In this paper, we propose a class of Hartley-Ross type unbiased esti- mators for estimating the finite population mean of the study variable under ranked set sampling (RSS), when population mean of the auxil- iary variable is known. The variances of the proposed class of unbiased estimators are obtained to first degree of approximation. Both theo- retically and numerically, the proposed estimators are compared with some competitor estimators, using three different data sets. It is iden- tified through numerical study that the proposed estimators are more effcient as compared to all other competitor estimators.Keywords : Ranked set sampling, auxiliary variable, variance