期刊名称：Journal of Reliability and Statistical Studies
印刷版ISSN：0974-8024
电子版ISSN：2229-5666
出版年度：2013
卷号：6
期号：1
页码：29-34
出版社：Ankur Printing Palace
摘要：In this paper,we have proposed a class of ratio-cum-dual to ratio estimatorsusing known values of some population parameters of the auxiliary variable to estimatethe population variance of the study variable.The expressions for the bias and mean squareerror of the proposed estimatorshavebeen derived upto the first order of approximation.A comparison has been made with some well known estimators,such assample variance(2ys), Isakiratio type (Rt)and the dual to ratio type(( )dt)estimatorsofthepopulation variance and it isshown that the proposed estimatoris better than the mentionedestimators under the optimum condition.For illustration,an empirical study has been carried out
关键词：Class o;f estimators; ;D;ual to ratio estimator; ;B;ias;M;ean square;error
