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wangqing2002108

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zaq123321

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I am not very sure my understanding is correct or wrong. Deviation is ·½²î£¬standard deviation is ±ê×¼²î, square root of deviation, about second order momentum. Bias is Æ«, difference between sample and expectation, about first order of momentum

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
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