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Exponential Estimators of Population Mean in Post-Stratified Sampling using Known Value of Some Population Parameters
Onyeka, A. C., Nlebedim, V. U., Izunobi, C. H.
Volume 13 Issue 9
Global Journal of Science Frontier Researc
Volume 13 Issue 9
Global Journal of Science Frontier Researc
This paper proposes some exponential estimators of the population mean in post-stratified sampling (PSS) scheme, when using known value of some population parameters. The bias and mean squared error of the proposed estimators are obtained up to first order approximations. Conditions under-which the proposed estimators perform better than other estimators, like the post-stratified sampling mean estimator, the ratio type estimator and the dual to ratio estimator, proposed by Onyeka (2012, 2013), are obtained. The theoretical results are further verified and confirmed using numerical illustrations.
