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- UID
- 223400
- 帖子
- 317
- 主题
- 11
- 注册时间
- 2011-7-11
- 最后登录
- 2014-8-2
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Iginla2010 Wrote:
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> Forget about formulas. Just think for a
> second...what is standard deviation? And how can
> it be negative?
my thoughts exactly.... |
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发表于 2011-7-27 12:07
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