Guy Ratel 2005 Metrologia 42 140 doi:10.1088/0026-1394/42/2/009
Guy Ratel
Show affiliationsSome formulae used for evaluation of the uncertainties of the degree of equivalence between laboratories participating in an international comparison of activity measurement are presented. Two approaches are considered using two different estimators for the key comparison reference value: the arithmetic mean and the weighted mean. For each approach, four cases which can be encountered when dealing with comparison data are detailed. Finally, the effect of the uncertainties on the weights used in the second approach is also considered. This work has been developed for analysis of results of comparisons organized in the field of ionizing radiations, but the formulae are sufficiently general to allow their use for other comparisons. However, correlations between results have not been considered.
Issue 2 (April 2005)
Received 16 December 2004
Published 21 March 2005
Guy Ratel 2005 Metrologia 42 140
A Gosset and T Madec 2005 Metrologia 42 07003
D Burns 2004 Metrologia 41 L3
A Picard et al 2004 Metrologia 41 396
H-J von Martens et al 2004 Metrologia 41 09002
P W Martin 2003 Metrologia 40
Gérard Petit 2003 Metrologia 40 S252
S N Lea et al 2003 Metrologia 40 84
R Davis and M Gläser 2003 Metrologia 40 339
G Ratel and C Michotte 2003 Metrologia 40 06040