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Ranked Set Sampling with Non-Random Selection of Sets and Errors in Ranking

Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 36, No. 2 (1987), pp. 145-152 (8 pages) Ranked set sampling is a technique for estimating the mean of a population, of use ...
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Linear Regression with Non-Constant, Unknown Error Variances: Sampling Experiments with ...

John A. Jacquez, Frances J. Mather and Charles R. Crawford The theory of simple linear regression is extended to the case of non-uniform error variances for the ...