Ranked Set Sampling: Ranking Error Models and Estimation of Visual Judgment Error Variance

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Abstract

Ranked set sampling where sampling is based on visual judgment of the differences between the sizes of pairs of units or on a concomitant variable is reviewed. An alternative model for judgment ranking based on ratios of sizes of pairs of units is presented. Computation of the variance of a visual ranked set sampling estimator of the mean of a distribution is enabled via maximum likelihood estimation of the visual judgment error variance. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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