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Comments on "Cofino statistics"

Fearn, T; (2004) Comments on "Cofino statistics". ACCREDIT QUAL ASSUR , 9 (8) 441 - 444. 10.1007/s00769-004-0790-5.

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Cofino et al. have put forward a method for the analysis of data from interlaboratory studies. The method uses ideas and notation from quantum chemistry, and is quite sophisticated. A critical examination shows that it has some relationship with both kernel density estimation and robust estimation methods. The quantitative results it provides are not founded on any statistical probability model, and it is not at all clear how the variance in particular is to be interpreted. There is no clear argument for adopting Cofino statistics in preference to simple problem-free methods that are at least as effective in estimating a concensus value.

Title:Comments on "Cofino statistics"
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Statistical Science

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