Admissibility of the usual estimators un
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Guohua Zou; Hua Liang
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Article
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1997
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Elsevier Science
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English
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In this paper, we first point out that a result in Mukhopadhyay (1994) on the optimality of the usual estimator s 2 of 2 (wherefmeans finite population variance is not true. We then give a necessary and sufficient condition for ((1 -f)/n) sy the sampling fraction) as the estimator of the precision o