GRE数学(Barron模考)每日一题 第14期
日期:2014-09-02 17:57(单词翻译:单击)
GRE数学试题
If a certain sample of data has a mean of 20.0 and a standard deviation of 3.0, which of the following values are more than 2.5 standard deviations from the mean?
A.12.0
B.13.5
C.17.0
D.23.5
E.28.5
参考答案
正确的答案:A E
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