MODIFIED PRODUCT ESTIMATOR UNDER TWO–PHASE SAMPLING
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Date
2019
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Publisher
GLOBAL JOURNAL OF PURE AND APPLIED SCIENCES
Abstract
In this paper, modification of product estimator under two-phase sampling was suggested. The modified product
estimator was obtained through transformation in two cases using sample mean of auxiliary variables. Case one
was when the second sample was drawn from the first sample while case two was when the second sample was
drawn from the population. The bias and mean square error (MSE) of the modified product estimator was
obtained. The theoretical and numerical validity of the modified product estimator under the two cases were
determined to show it superiority to some considered existing product estimators. Numerical results shows that
the modified product estimator under the two cases were more efficient than the considered existing estimators.
Description
Keywords
Product estimator, Two-Phase Sampling, Bias, Mean Square Error