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求解一题关于平均数呵标准差的数学题。谢谢!
The arithmetic mean of a data set is 46 and the standard deviation of the set is 4. Which value is exactly 1.5 standard deviation from the arithmatic mean of the set?
A 42 B 44.5 C47.5 D 50 E 52
参考答案是E |
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