Accreditation and Quality Assurance ( IF 0.9 ) Pub Date : 2021-08-24 , DOI: 10.1007/s00769-021-01474-8 Clara Morales 1 , Ramón Giraldo 2 , Marta Torres 3
The box and whiskers plot (boxplot) has shown to be an effective data visualization tool in proficiency testing. The boxplot provides a quick visual summary of the considered data set . All the descriptive aspects of data reported in a round of a proficiency test can be studied with this plot. Location (through median and quartiles), spread (by means of the interquartile range), shape (position of the median in the box), and possible outliers (values beyond of the fences) are simultaneously observed with the boxplot. In this paper, we propose a modification of the inner fences of the boxplot, in such a way that they are in accordance with the approach based on the z score (standard ISO 13528) and therefore useful to recognize graphically questionable and unacceptable values in proficiency testing.
中文翻译:
能力验证中的箱线图围栏
盒须图 (boxplot) 已被证明是能力验证中一种有效的数据可视化工具。箱线图提供了所考虑数据集的快速可视化摘要。可以使用此图研究在一轮能力测试中报告的数据的所有描述方面。使用箱线图同时观察位置(通过中位数和四分位数)、传播(通过四分位距)、形状(中位数在框中的位置)和可能的异常值(超出围栏的值)。在本文中,我们建议修改箱线图的内围栏,使它们符合基于z分数的方法(标准 ISO 13528),因此有助于识别图形上有问题和不可接受的熟练度值测试。