Franco Pavese 2009 Metrologia 46 L29 doi:10.1088/0026-1394/46/6/L02
Franco Pavese
Show affiliationsThe ISO TS21748:2003 statement that the laboratory component of 'bias' included in the model and indicated by B in ISO 5725-2:1994 has "zero expectation" is evaluated critically. It is found that this condition should apply not to the Bk of each laboratory modelled in ISO 5725-2:1994, but to the expectation of the distribution of the Bk in a comparison when the method of choosing the participant laboratories supports the hypothesis that it becomes a 'random effect'. A few related inconsistencies are also discussed.
Issue 6 (December 2009)
Received 15 May 2009, in final form 2 November 2009
Published 19 November 2009
Franco Pavese 2009 Metrologia 46 L29
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