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Ifacertainsampleofdatahasameanof20.0andastandarddeviationof3.0,whichofthefollowingvaluesismorethan2.5standarddeviationsfromthemean?A.12B.13.5C.17D.23.5E.26.5大哥,大姐们不是用翻译软件翻译下就OK啊?给下

题目详情
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~
▼优质解答
答案和解析
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