Correct evaluation of type-B standard uncertainty |
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Authors: | R L Kadis |
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Affiliation: | (1) Group of Structural Integrity, Superior Polytechnic School, University of Burgos, Avda. de Cantabria s/n, 09005 Burgos, Spain |
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Abstract: | The evaluation of uncertainty components “by means other than the statistical analysis of series of observations” (type-B
evaluation) is considered. The problem comes down to selection of an appropriate a priori probability distribution of a random
quantity within specified limits on the basis of all available information. Typical situations are indicated that lead to
simple model distributions: rectangular (uniform), triangular, normal, and arcsine. Attention is drawn to the unjustified
use of the iniform distribution model in examples of measurement-uncertainty evaluation.
Translated from Izmeritel'naya Tekhnika, No. 5, pp. 33–34, May, 2000. |
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