最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦~
The mean of the values in a data set is 40, and the standard deviation of the values is d. The value 50 is 2 more standard deviations above the mean than the value 42 is. What is the value of d?
4 显示答案
以上解析由 考满分老师提供。