---- Miles Medina <[email protected]> wrote: 

> 
> Also, I would add, in response to a comment above.. someone said
> correlation implies causation. Yes it may, of course, but let's not forget
> that there could be a third variable that causes the two correlated ones
> originally in question. 

I believe that the meaning of what was originally stated was that correlation 
suggests a possibility, not that it implies or infers causation.  Certainly we 
all know about the false reasoning that allows us to believe in causation due 
to correlation, when the relationship is simply coincidental.

BTW, for your story about the cat: In a statistical sense, the head predicts 
the tail.  Quite a difference from the head causes the tail.

David McNeely

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