作者mili ()
看板Statistics
标题[问题] joint distribution
时间Wed Sep 30 10:33:18 2009
最近开始修基础统计发现自己拿joint distribution很没办法
请板众帮忙解答下面这个问题 (1000批币酬谢):
the random variables X and Y have joint pdf fxy( x, y)=1 in the triangle of
the XY-plane determined by the points (-1,0) (1,0) and (0,1)
find fx(5)
find fy(y)
find fy|x(y|x=0.5)
顺便请问板众有推荐的基础数学统计教科书吗?
例如会有poisson distribution mean 跟 variance=lambda的详细证明
感谢!
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◆ From: 24.128.184.148
※ mili:转录至看板 Math 09/30 10:42
1F:→ casella123:你有想法跟作法吗? 09/30 10:44
2F:推 Annihilator:fx(5)=0 but fx(.5)=.5 09/30 14:09
3F:→ mili:感谢解答 09/30 20:12