问答题
1分
对轴承合金中锑的质量分数进行了十次测定,得到下列结果:15.48%, 15.51%, 15.52%, 15.53%, 15.52%, 15.56%,15.53%,15.54%,15.68%,...
对轴承合金中锑的质量分数进行了十次测定,得到下列结果:15.48%, 15.51%, 15.52%, 15.53%, 15.52%, 15.56%,15.53%,15.54%,15.68%,15.56%,试用Q检验法判断有无可疑值需弃去(置信度为90%)?
参考解析:
答案:
P=0.90,n=10,查表得Q0.90=0.41
将数据按大小顺序排列:15.48% 15.51% 15.52%15.52% 15.53% 15.53% 15.54% 15.56% 15.56%15.68%
xn-xn-1=15.68%-15.56%=0.12%
x2-x1=15.51%-15.486%=0.03%
所以15.68%应舍弃,而15.48%应保留。