How to encompass an uncorrected bias into the expanded uncertainty with a fixed coverage probability: calculation procedures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F17%3A43892983" target="_blank" >RIV/44555601:13520/17:43892983 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s00769-017-1268-6" target="_blank" >http://dx.doi.org/10.1007/s00769-017-1268-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00769-017-1268-6" target="_blank" >10.1007/s00769-017-1268-6</a>

Result language

angličtina

Original language name

How to encompass an uncorrected bias into the expanded uncertainty with a fixed coverage probability: calculation procedures

Original language description

The practice in analytical and medical laboratories often necessitates evaluating the uncertainty of measurement in such a way that incorporates the bias in the expanded uncertainty of measurement instead of correcting for it. This paper presents a complete procedure for calculating the coverage interval that is delimited with one of these approaches. The obtained interval is symmetrical with respect to the uncorrected measured value (x) and has a determined coverage probability (p) under a given bias (b) and combined standard uncertainty (uc); the approach is denoted by Ue(p). A possibility of this approach was suggested by Synek (Talanta 65:829?837, 7). The stated procedure enables to choose frequently used coverage probabilities (mainly 95 % and 99 %). The calculation of the Ue(p) expanded uncertainty requires quantifying a factor that multiplies uc. Its values depend on p, on b/uc and also on the effective number of degrees of freedom(m) of uc, especially at m of a small size; these values can be found in the attached tables. Since this accurate calculation can be qualified as too complex, a simplification is recommended by using two approximations that are applicable provided m C 6.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10103 - Statistics and probability

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Accreditation and Quality Assurance

ISSN

0949-1775

e-ISSN

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Volume of the periodical

2017

Issue of the periodical within the volume

22

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

179-186

UT code for WoS article

000405589400002

EID of the result in the Scopus database

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