| Autor: |
Michael Thompson, Kenneth Mathieson, Linda Owen, Andrew Damant, Roger Wood |
| Zdroj: |
Accreditation & Quality Assurance; Feb2009, Vol. 14 Issue 2, p73-78, 6p |
| Abstrakt: |
Abstract 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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