Sampling is an important method in statistics.

来源: quancheng88 于 2008-03-08 17:46:50 [] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

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• That is a good point! Although not accurate, it is informative. -yyknew- ♂ 给 yyknew 发送悄悄话 (0 bytes) () 03/08/2008 postreply 19:13:07

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