PROFICIENCY TEST WITH THE INFORMATION OF UNCERTAINTY: ANALYSIS WITH THE MAXIMUM LIKELIHOOD METHOD

Katsuhiro Shirono, Masanori Shiro, Hideyuki Tanaka, Kensei Ehara

Abstract

The analysis methods of proficiency test (PT) data, when the uncertainty information is given, and a reference laboratory does not exist, are investigated in this study. Mainly two methods are characterized; the analyses with (i) the robust method which we developed, and (ii) the maximum likelihood estimation. Consequently, it is confirmed that the applicability latter approach is validated only when some conditions are satisfied. Therefore, the former analysis is basically recommended.

Keywords

proficiency test, ISO 13528, E_n number, measurement uncertainty, posterior predictive check

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IMEKO-WC-2015-TC21-413.pdf

DOI

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IMEKO TC

TC21 - Mathematical Tools for Measurements

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