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Topic: Correlation coefficient question
Replies: 1   Last Post: Apr 3, 1995 4:26 PM

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Charlotte Clark

Posts: 4
Registered: 12/6/04
Correlation coefficient question
Posted: Apr 3, 1995 1:47 PM
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I'd like to pose a question to the group regarding the correlation coefficient,
r. As many of you may know, the TI calculator products display r as part of
the output with several of the regression models: linreg, lnreg, pwrreg, etc.
Note that we do not do any r correlation for the quadratic, cubic, and quartic
models?

I have heard pros and cons about the display of r - some prefer that it be
displayed with each of these models and some prefer that it not be displayed,
but that it be "hidden" away under a variables screen. By hiding it away, the
opinion is, we are keeping people from misusing it that are misinterpreting its
meaning.

My question is: What do you think? Should r be displayed with the models or
should it be "hidden"? Would it be better to display r^2 rather than r? Or
should we display both? Is there some other measure of fit that would be
better?

Thanks for your input,
Charlotte Clark
cclark@ti.com






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