The relationship between accreditation status and performance in a proficiency test
| Autor: | Kenneth Mathieson, Roger Wood, Linda Owen, Michael Thompson, Andrew Damant |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Engineering
Operations research business.industry General Chemical Engineering education General Chemistry Proficiency test health services administration Outlier Statistics Proficiency testing Statistical analysis Statistical dispersion Safety Risk Reliability and Quality Null hypothesis business Instrumentation geographic locations health care economics and organizations Statistical hypothesis testing Accreditation |
| Zdroj: | Accreditation and Quality Assurance. 14:73-78 |
| ISSN: | 1432-0517 0949-1775 |
| Popis: | In the FAPAS proficiency testing scheme, participants are asked to state whether the analytical method used was accredited or not accredited. It is thus possible to compare the stated accreditation status with performance in the scheme. For this purpose, fifty qualifying examples of analyte-test material combination were selected at random from the reports from the year 2006. The accredited/non-accredited subsets of results from each example were subjected to a statistical analysis to determine whether any significant differences between the distributions of results could be detected. Outliers were removed from the datasets before the main statistical tests and considered separately. The inlying data were subjected to non-parametric tests for differences in central tendency and dispersion. A few significant examples were found, but could be reasonably attributed to chance. Among the inliers there were no grounds to reject the overall null hypothesis, that is, that accreditation has no effect on performance. However, the proportion of outliers was about twice as high among the non-accredited group. |
| Databáze: | OpenAIRE |
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