摘要
通过对某陶土样品中铁、铝、钙、镁含量及烧失量五项指标的内部测试结果和外部实验室测试结果进行配对样本t检验,对比发现在进行陶土中Fe2O3含量和烧失量测试的时候,两个实验室之间不存在系统误差,在进行Al2O3、CaO和MgO含量测试的时候,两个实验室之间存在系统误差。
We used Student's t test of the paired samples to detect the five indicators of clay samples of an iron,aluminum,calcium,magnesium,and loss on ignition between the two labs.We found that there is no system error of Fe2O3 and loss on ignition between the two labs,and it has error of Al2O3,CaO and MgO at the same time.
作者
李龙
Li Long(Shannxi Branch of China Geological Exploration Center of Building Materials Industry)
出处
《上海计量测试》
2020年第5期32-34,37,共4页
Shanghai Measurement and Testing
关键词
质量控制
配对样品
T检验
系统误差
quality control
paired samples
Student's t test
system error
