作者WiseWater (Guest)
看板Statistics
标题Re: [问题] 机率一题
时间Sun Oct 28 23:17:33 2007
※ 引述《WiseWater (Guest)》之铭言：
: X~N(0,1)
: P(Y=sqrt(3))=P(Y=-sqrt(3))=1/6, P(Y=0)=2/3,
: Show that E(X^r)=E(Y^r).
: Thanks.
Romano and Siegel point out :
For any finite n there exists a discrete,and hence
nonnormal , random variable whose first n moments
are equal to those of X.
这两位统计学家 ,说了连续跟离散分配r阶动差的关系
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1F：推 TOOYA:所以你上一题到底是要证明前五阶动差都一样？还是任意阶一样 10/28 23:51
2F：推 WiseWater:5阶即可 题目是我用记的 不好意思 10/29 18:54