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davidmtl8 (davidmtl) 于 (Mon Feb 11 13:34:55 2008) 提到:
请问一个问题, two random variables x and y (do not know distributions of x
and y)
what is mean of (x/y), mean of ((x/y)2)
and variance of (x/y)
希望给些详细的说明,我是菜鸟一个.
谢谢
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davidmtl8 (davidmtl) 于 (Mon Feb 11 13:45:17 2008) 提到:
假设已知 mean of x and y, variance of x and y and covariance of (x,y)
ask for mean of (x/y), mean of ((x/y)2) and variance of (x/y)
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