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If a certain sample of data has a mean of 20.0 and a standar

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/07/17 21:19:03
If a certain sample of data has a mean of 20.0 and a standard deviation of 3.0,which of the following values is more than
2.5 standard deviations from the mean?
A.12
B.13.5
C.17
D.23.5
E.26.5
大哥,大姐们不是用翻译软件翻译下就OK啊?给下怎么算的~
如果有数据的某些样品有20.0均值为3.0,以下值这比标准差
2.5标准差?20.0X3/2.5X3