Partial Correlations

[Leonard N. Bloksberg]

In Article <NEWTNews.805790451.17223.skillian at Global-PPP.globalcom.net> "skillian at globalcom.net" says:
> What is the difference between a negative significant 
> correlation and the absence of a correlation? 
>     Sue Killian
> 
A negative correlation coeficient usually means that the 2 factors are 
correlated, but with opposite slope.  That is, as factor 1 gets larger, 
factor 2 gets predictably smaller.  This is just as useful and important as 
a posative corr.