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Home  >  Volume 52

3. EFFICIENCY OF NEW ESTIMATORS OF POPULATION MEAN UNDER TWO-PHASE SAMPLING by Abubakar I., YahayaA. and Doguwa S.I.S. Volume 52 (July & Sept., 2019 Issue)
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EFFICIENCY OF NEW ESTIMATORS OF POPULATION MEAN UNDER TWO-PHASE SAMPLING

Abubakar I., YahayaA. and Doguwa S.I.S.

Department of Statistics, Ahmadu Bello University, Zaria, Nigeria

Abstract

In this article the efficiency of some estimators of population mean under two-phase sampling is investigated. In some earlier researches when    is not attainable due to incomplete or insufficient information,   is used to estimate ; that is by utilizing information obtained from an auxiliary variable. The bias and mean square (MSE) have been derived up to second degree to determine the performance of the new estimators using some published available datasets and the results obtained reveals that the proposed estimators are more efficient.

Keywords: Ratio Estimator, Two-phase Sampling, Auxiliary Variable, Mean Squared Error, Efficiency

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