MODIFICATION OF RATIO ESTIMATOR UNDER TWO PHASE SAMPLING
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Date
2018
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FUW Trends in Science & Technology Journa
Abstract
In this paper, modification of Adebola and Adegoke’s report on ratio estimator was suggested. The modified
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 why case two was when the second sample was
drawn from the population. The bias and mean square error (MSE) of the modified ratio estimator in the two cases
were obtained. The theoretical and numerical validity of the modified ratio estimator under the two cases were
determined to show its superiority over some considered existing related ratio estimators. Numerical results shows
that the modified ratio estimator under the two cases were more efficient than the considered existing related
estimators
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Keywords
Ratio estimator, two-phase sampling, bias, mean square error