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kanger0

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snowice_ren: ½ð±Ò+3, ¡ïÓаïÖú 2012-12-19 23:48:39
snowice_ren: ½ð±Ò+2 2012-12-20 08:52:43
Ò»°ã²»¶ÀÁ¢. µ«¶ÔÓÚÌØÊâµÄϵÊý, ²»Ò»¶¨.
2Â¥2012-12-19 19:45:37
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snowice_ren

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2Â¥: Originally posted by kanger0 at 2012-12-19 19:45:37
Ò»°ã²»¶ÀÁ¢. µ«¶ÔÓÚÌØÊâµÄϵÊý, ²»Ò»¶¨.

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3Â¥2012-12-19 21:41:05
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math2000

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snowice_ren: ½ð±Ò+3, ¡ï¡ï¡ïºÜÓаïÖú, лл 2012-12-19 23:48:00
snowice_ren: ½ð±Ò+2 2012-12-20 08:52:34
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3Â¥: Originally posted by snowice_ren at 2012-12-19 21:41:05
ÄÇÔÙÎÊһϣ¬ÓÉÓÚX1£¬X2£¬X3...µÈ¶ÀÁ¢Í¬·Ö²¼£¬ÊÇ·ñÓÐA1£¬A2£¬A3¾ùΪÕý̬·Ö²¼£¬¸ÅÂÊÂÛʱ¼ä³¤Á˶¼¸øÍüÁË£¬Ð»Ð»À²...

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4Â¥2012-12-19 22:15:57
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kanger0

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by snowice_ren at 2012-12-19 21:41:05
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5Â¥2012-12-19 22:26:35
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snowice_ren

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4Â¥: Originally posted by math2000 at 2012-12-19 22:15:57
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6Â¥2012-12-19 23:51:23
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kanger0

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
6Â¥: Originally posted by snowice_ren at 2012-12-19 23:51:23
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cov(X,XY)=E(X*XY)-EX*EXY=EX^2EY-(EX)^2EY=(DX)(EY)
7Â¥2012-12-20 07:56:34
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snowice_ren

Ìú³æ (³õÈëÎÄ̳)

ÒýÓûØÌû:
7Â¥: Originally posted by kanger0 at 2012-12-20 07:56:34
cov(X,XY)=E(X*XY)-EX*EXY=EX^2EY-(EX)^2EY=(DX)(EY)...

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