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关注：1
2013-05-23 12:21
求翻译：一个总量的标准差或一个随机变量的标准差，及一个子集合样品数的标准差之间，有所差别。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
一个总量的标准差或一个随机变量的标准差，及一个子集合样品数的标准差之间，有所差别。
问题补充： |
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2013-05-23 12:21:38
A total standard deviation or a random variable standard deviation, and a subset of the differences between the standard deviation of the number of samples.
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2013-05-23 12:23:18
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2013-05-23 12:24:58
A total quantity standard deviation or a random variable standard deviation, and between a sub-set sample number standard deviation, has a difference.
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2013-05-23 12:26:38
A total standard deviation or standard deviation of a random variable, and a collection of sample standard deviation for the number between differently.
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2013-05-23 12:28:18
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