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27 results for “Proficiency testing”
The statistical toolbox for proficiency testing: assigned values, performance statistics such as z-scores and En numbers, and homogeneity/stability assessment. ISO Statistics
Competence requirements for organizations that design and run proficiency testing schemes used by laboratories to demonstrate ongoing performance. ISO/IEC Quality & Accreditation
Evaluation of participant performance against pre-established criteria by means of interlaboratory comparisons — an ISO/IEC 17025 requirement for demonstrating ongoing competence. ISO/IEC…
A proficiency-testing statistic z = (x − X)/σ_pt comparing a participant result with the assigned value in units of the standard deviation for…
…Control chart values are obtained over time and usually have more degrees of freedom than results from one or a few proficiency testing results…
…U²(x) + U²(X)). |En| ≤ 1 indicates agreement within expanded uncertainties; it is the standard scoring for calibration proficiency tests. ISO 13528:2022 Statistics
…Use of externally obtained data from calibrations, proficiency tests, and interlaboratory comparisons in the assessment of errors and bias in measurement results; and g…
…I Analysis without computer assistance (data sets) Data that is published in an SOP, generated by the laboratory, used for a proficiency test, or…
Proficiency testing results for calibration laboratories usually arrive as an En number: the difference between your result and the reference value, divided by the…
…Calculate x and s for the new set of data and examine for significant differences from the former using the t-test and F…
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