Mathematical Statistical Analysis on Proficiency Testing of the Total Number of Bacteria
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Ruixuan Liu, Hongwei Wang, Jia Luo, Chao Wan
In the paper the Proficiency Testing of the total number of bacteriain 34 laboratories were Analyzed and Counted. Z-score number were determined by statistical method. The Z-score was a standardized value assigned to each result. The testing results of 34 participating laboratories were evaluated. 3 laboratories with a Z-score of greater than 3 were unqualified results; 2 laboratories with a Z-score of less than 3 and greater than 2 were suspicious results.
The total number of bacteria, Proficiency testing, Robust statistical analysis, Z-score