作者trml (...)
看板Statistics
标题[问题] 求救 不知为何算不出来
时间Mon May 15 20:51:01 2006
题目：
Let f(x,y) = 2, 0 < x < y , 0 < y < 1 ,zero elsewhere,be the joint pdf.
Show that the condition mean are , respectively , (1+x)/2,0 < x < 1 ,and
y/2 , 0 < y < 1.
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1F：推 kegio:E[Y|X]=∫y(1-x)^(-1)dy 范围从x积到1 05/16 20:36