(1/sqrt(n))(x1+x2+...+xn)趋向正态当n,即随机变量个数，越来越多。

(1/sqrt(n))(x1+x2+...+xn)趋向正态当n,即随机变量个数，越来越多。

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送交者: 短江学者于 2008-05-30, 19:52:28:

回答: 什么是随机因素多？由 sinoMD 于 2008-05-30, 19:48:12:

This assume x1,xn are independent and follow identical distribution (无内容) - HunHunSheng (0 bytes) 2008-05-30, 20:38:53 (231566)
- not necessarily. conditions can be a bit weaker. - 短江学者 (46 bytes) 2008-05-30, 21:44:47 (231579)
  - not all things converge to normal (无内容) - sinoMD (0 bytes) 2008-05-30, 22:11:51 (231585)