In article <[EMAIL PROTECTED]>,
Howard S. Hoffman <[EMAIL PROTECTED]> wrote:
>I stand corrected. I had not considered the requirement of homogeniety of
>varience. Sure, if U=2 V must be 0. hence, for certain values of U , V can be
>predicted exactly.
> Howard S. Hoffman
Homogeneity of variance is not enough, either. It is easy to
construct examples do the conditional means and variances are
the same, and yet the two random variables are not independent.
If the condition expectation of EVERY function of V is
independent of U, the random variables are independent.
--
This address is for information only. I do not claim that these views
are those of the Statistics Department or of Purdue University.
Herman Rubin, Dept. of Statistics, Purdue Univ., West Lafayette IN47907-1399
[EMAIL PROTECTED] Phone: (765)494-6054 FAX: (765)494-0558
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