穆同学2017-08-24 12:17:05
25题n能mmama f麻烦llalaolao slao shlao shi老师zzhzhozhonzhongzhong wzhong wezhong wen中文jjijiejie djie du解读xxixia下mme么?wwowo ywo yiwo yi wwo yi wewo yi wei我以为qqiqiu求zzozonzongzong tzong ti总体CI
回答(1)
金程教育顾老师2017-09-06 11:16:50
学员你好,查z分布表,双尾α=1%单尾α=0.5%得z=2.58,置信区间的下限应是均值31减t值乘标准差(根号529)除样本量开根号(根号65)得到,即31-2.58*根号529/根号65=23.64
- 评论(0)
- 追问(0)
评论
0/1000
追答
0/1000
+上传图片