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标题: tt gwd 15-7 [打印本页]

作者: pinkcutie 时间: 2006-11-12 16:06
标题: tt gwd 15-7

If each of the 8 employees working on a certain project received an award, was the amount of each award the same ?

(1) The standard deviation of the amounts of the 8 awards was 0.

(2) The total amount of the 8 awards was $10,000.

答案是a

请问标准差的定义是什么？

我怎么觉得应该选e呢

多谢

作者: 晴天小狗 时间: 2006-11-12 17:16

标准方差可以理解为与平均值之差的平方和

mm可以搜索以下标准方差的公式就明白了

作者: pinkcutie 时间: 2006-11-12 17:35

谢谢

gg什么时候考？

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