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The Reliability of Assigned Values from the GeoPT Proficiency Testing Programme from an Evaluation of Data for Six Test Materials that have been Characterised as Certified Reference Materials |
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| Authors: | Philip J Potts Michael Thompson Peter C Webb |
| Institution: | 1. Faculty of Science, The Open University, Milton Keynes, UK;2. School of Biological and Chemical Sciences, Birkbeck University of London, London, UK |
| Abstract: | Assigned values derived from the GeoPT proficiency testing programme were compared with certified values for six certified reference materials that have been used as test materials in the GeoPT programme. Statistical analysis showed that there were few significant differences between these sets of data and that these differences had no significant impact on the GeoPT assessment when fitness‐for‐purpose criteria were taken into account. |
| Keywords: | proficiency testing assigned value certified value GeoPT statistical analysis fitness for purpose test de compé tence valeur attribué e valeur certifié e GeoPT analyse statistique aptitude à l'emploi |