实验室间比对能力验证中的两种稳健统计技术探讨

Two Robust Statistic Techniques in Proficiency Testing by Interlaboratory Comparisons

对环境监测实验室能力验证中两种稳健数据统计技术以及z比分数评价准则进行了探讨,并介绍了如何使用Excel电子表格软件实现数据的统计处理。四分位数法和迭代法均可作为实验室比对能力验证的数据处理技术,相对于四分位数稳健统计方法,迭代法是一种更加温和且可靠的稳健统计方法,但不适用于分割水平设计的能力验证计划。

Two robust statistic techniques and z-score in proficiency testing of environmental monitoring laboratories were discussed and Excel implementation.Quartile and iteration robust statistic techniques both can be used in data analysis of proficiency testing by interlaboratory comparisons.Compare to quartile robust statistic techniques,iteration technique is more mild and reliable,but it is not suitable for proficiency testing with split-level test sample.