@article{article_524456, title={A class of Hartley-Ross type unbiased estimators for population mean using ranked set sampling}, journal={Hacettepe Journal of Mathematics and Statistics}, volume={45}, pages={917–928}, year={2016}, author={Khan, Lakhkar and Shabbir, Javid}, keywords={Ranked set sampling,auxiliary variable,variance}, abstract={<div>In this paper, we propose a class of Hartley-Ross type unbiased esti- </div> <div>mators for estimating the finite population mean of the study variable </div> <div>under ranked set sampling (RSS), when population mean of the auxil- </div> <div>iary variable is known. The variances of the proposed class of unbiased </div> <div>estimators are obtained to first degree of approximation. Both theo- </div> <div>retically and numerically, the proposed estimators are compared with </div> <div>some competitor estimators, using three different data sets. It is iden- </div> <div>tified through numerical study that the proposed estimators are more </div> <div>effcient as compared to all other competitor estimators. </div>}, number={3}, publisher={Hacettepe University}