Evaluation of Measurement Comparisons Using Generalized Least Squares: the Role of Participants’ Estimates of Systematic Error

John F. Clare, Annette Koo and Robert Davies

Communications in Statistics - Theory and Methods, 2014, vol. 43, issue 20, 4297-4307

Abstract: We consider the evaluation of laboratory practice through the comparison of measurements made by participating metrology laboratories when the measurement procedures are considered to have both fixed effects (the residual error due to unrecognised sources of error) and random effects (drawn from a distribution of known variance after correction for all known systematic errors). We show that, when estimating the participant fixed effects, the random effects described can be ignored. We also derive the adjustment to the variance estimates of the participant fixed effects due to these random effects.

Date: 2014
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DOI: 10.1080/03610926.2012.724510

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