by Richard Hogan Resolution uncertainty is the uncertainty in measurement contributed by resolution of measurement equipment. Resolution Uncertainty is a factor that contributes to uncertainty in measurement. Its influence should be considered in every uncertainty […]
The other day I read an article titled “Five easy steps for adding measurement uncertainties to your calibration data.” It described a very easy process of copying cells from one Microsoft Excel® file to another, […]
by Hening Huang The Welch-Satterthwaite (WS) formula estimates an “effective degrees of freedom” of an approximate Chi-square distribution formed from a combination of several sample variances of independent normal populations. The effective degrees of freedom […]
by Ted Doiron While check standards will eventually give the most accurate uncertainty for a calibration procedure, the time and expense can be discouraging. Another common method, standard Gage Repeatability and Reproducibility study does not […]
by Richard Hogan Probability distributions are a part of measurement uncertainty analysis that people continually struggle with. Today, my goal is to help you learn more about probability distributions without having to grab a statistics […]
by Ted Doiron Uncertainty has proven difficult to implement in calibrations labs. The subject has advanced mathematics and statistics that are often needed for scientific research, but are seldom needed to develop uncertainty budgets for […]
by Hugo Gasca, Luis Omar Becerra, Victor Serrano, & Luis Manuel Peña Calibration information of experimental instruments often is used for correcting measurements. In this work we present examples of analysis of historic data from […]
by Jonathon Harben This paper explores the similarities and differences between a measurement uncertainty as described in the GUM and a manufacturer’s specification when the history of compliance testing results is taken into consideration. It […]
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