Robust Statistics Analysis and Difference Significance Test of the Test Data of Laboratory Proficiency Testing

Abstract

Statistical analysis of the results in laboratory proficiency testing occupies an important position in the verification activities, this article reviewed the most widely used method in laboratory proficiency testing called robust statistical Z-Score, and a statistical analysis of the results was done with the application of SPSS software, F test was applied to the results which were divided into different groups according to the different test methods each laboratory used. It is helpful to determine whether each test method has significant effects on the results of laboratory testing and a further analysis.