It is important to deal with the results of the laboratory proficiency testing by using appropriate statistical method.This paper analyzes the attributes of robust statistical methods,robust statistics,mathematical model of Z-score and evaluation criteria of robust statistics.This paper analyzes and evaluates the test results of 36 laboratories for partici-pating proficiency testing on the fine content in manufactured sand sample A and sample B by using the robust statistical method.The results show that after the robust statistical method the testing ability of each laboratory can be truly and comprehensively reflected;By judging the doubtful or outlier data and taking timely countermeasures,the laboratory testing ability is improved;It is convenient for the manager to take corrective measures to improve the laboratory whose ability evaluation is doubtful or unsatisfactory,so as to continuously maintain the testing capability of the laboratory.
NETL
NSTL
万方数据
