Re: large negative parameter correlations in regression

Reef Fish wrote:
Anon. wrote:
Reef Fish wrote:
Anon. wrote:
Reef Fish wrote:
Stephen Clark wrote:
<snip>
So, no change there.
--
Bob O'Hara
Department of Mathematics and Statistics

Your reply was so non-specific, so speculative, so name-dropping
without knowing what you were talking about that it would require
FREE tuition to explain it to YOU, without benefiting the OP.

Name dropping? Check: I didn't even mention any names!

Non-specific? Like this: "Prediction: the mean of the variable is a long way from zero." That's so specific, it's falsifiable. Or like this: "If you mean-centred your variables, then the correlation will go away." Again, falsifiable.

Go on, show that the second statement is wrong, i.e that if the mean of a covariate in a simple least-squares regression is zero, then the correlation between the slope and intercept is non-zero.

Let's have some statistical substance to your attacks on me, for a change.

Bob

--
Bob O'Hara
Department of Mathematics and Statistics
P.O. Box 68 (Gustaf Hällströmin katu 2b)
FIN-00014 University of Helsinki
Finland

Telephone: +358-9-191 51479
Mobile: +358 50 599 0540
Fax: +358-9-191 51400
WWW: http://www.RNI.Helsinki.FI/~boh/
Journal of Negative Results - EEB: www.jnr-eeb.org
.

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