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IJSTR >> Volume 9 - Issue 1, January 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Weighted Estimator Of Population Mean Under Stratified Random Sampling

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Sarbjit Singh Brar, Ravinder Kumar



Stratified Random Sampling, Proportional Allocation, Optimum Allocation, Weighted Estimator.



In this paper, an unbiased weighted estimator of population mean is introduced in stratified random sampling which uses the information of mean square of each stratum at the estimation stage. It is shown that the proposed estimator is better than usual estimator of population mean under arbitrary and proportional allocation in stratified random sampling. Further, under certain conditions, it is proved that the proposed estimator under proportional allocation is better than usual estimator under Neyman’s allocation (Optimum allocation) and both are equally efficient if each of the stratum has equal coefficient of variation. A simulation study is carried out to verify the proposed results.



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