作者dadayaki (DADA)
站内Statistics
标题[问题] 期望值
时间Sat Nov 21 13:05:05 2009
Three number are independently picked from a uniform distribution (0，5)
Let X1 X2 X3 be the three numbers and let g(X1，X2，X3)be the function:
g(X1，X2，X3)=X1X2^2X3
(1)E(g(X1,X2,X3))
(2)E(X1X2^2X3)
两小题的差别在哪里呢??
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 114.27.187.120
1F：推 azonazon:没差吧... 11/22 22:08
2F：→ goshfju:E(g(X1,X2,X3)) = E(X1X2^2X3) ... 囧 11/22 23:54