A general rule is proved for estimating the variance in multistage designs when the primary sampling units (psu's) are selected without replacement with unequal probabilities. The rule is used for ...
Mathematical Proceedings of the Royal Irish Academy, Vol. 99A, No. 2 (Dec., 1999), pp. 171-177 (7 pages) In this paper we derive the exact covariance of some sample moments for 'simple random sampling ...
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