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  5. Reliability of reference standard uncertainty components arise from heterogeneity and instability

Reliability of reference standard uncertainty components arise from heterogeneity and instability

V.S. Yeremenko, V.M. Mokiychuk, O.V. Samoylichenko
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The method to determine the reliability of reference material uncertainty components estimations caused of heterogeneity and instability of substance or material tested properties has given. The method is based on using the functions of power for statistical criterion, used for sample data estimations against the statistical parameters and sample size. Method makes it possible to increase the accuracy of the evaluation of heterogeneity and instability characteristics of reference material and combined standard uncertainty of certified value of substance or material.
Keywords: homogeneity, stability, statistical criteria, function of power, uncertainty