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Optimal use of two auxiliary variables in double sampling

Author

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  • Giancarlo Diana

    (University of Padova (Italy))

  • Chiara Tommasi

    (University of Milano)

Abstract

. Double sampling scheme is used when cheap auxiliary variables may be measured to improve the estimation of a finite population parameter. Several estimators for population mean, ratio of means and variance are available, when two dependent samples are drawn. However, there are few proposals for the case of independent samples. In this paper both cases of dependent and independent samples are dealt with. A general approach for estimating a finite population parameter is given, showing that all the proposed estimators are particular cases of the same general class. The minimum variance bound for any estimator in this class is provided (at the first order of approximation). Furthermore, an optimal estimator which reaches this minimum is found.

Suggested Citation

  • Giancarlo Diana & Chiara Tommasi, 2004. "Optimal use of two auxiliary variables in double sampling," Statistical Methods & Applications, Springer;Società Italiana di Statistica, vol. 13(3), pages 275-284, December.
    • Handle: RePEc:spr:stmapp:v:13:y:2004:i:3:d:10.1007_s10260-004-0098-y
    DOI: 10.1007/s10260-004-0098-y
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