HARTLEY-ROSS UNBIASED ESTIMATOR OF POPULATION MEAN IN RANKED SET SAMPLING USING TWO AUXILIARY VARIABLES

Authors : Lakhkar KHAN, Javid SHABBİR

Pages : 195-203

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Publication Date : 2017-06-19

Article Type : Other Papers

Abstract :This paper proposed Hartley-Ross insert ignore into journalissuearticles values(HR); unbiased estimator of the finite population mean using two auxiliary variables in ranked set sampling insert ignore into journalissuearticles values(RSS);. The variance of the proposed unbiased  estimator is obtained to first degree of approximation. Comparison among the proposed and some existing estimators are made both theoretically and through simulation study. It is shown that the proposed estimator is more efficient as compared to all other competitor estimators under  RSS scheme.
Keywords : Ranked set sampling, unbiased estimator, efficiency