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Protocols in ecological and environmental plant physiology


Article << Previous     |     Next >>   Contents Vol 3(4)

A method for unbiased selective sampling, using ranked sets

GA McIntyre

Australian Journal of Agricultural Research 3(4) 385 - 390
Published: 1952


A new method of sampling is described. Take the largest in the first of n sets, each of n random items, the second largest in the second set, and so on to the smallest in the nth set. The sample of n items selected in this way is an unbiased sample of the population. For typical unimodal distributions the mean of such a sample is slightly less than (n + 1)/2 times more efficient than the mean of n items taken at random. The application of the ranked sample method to pasture measurement is discussed.

Full text doi:10.1071/AR9520385

© CSIRO 1952

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