Sunday, 29 March 2009

Correlation



For those who voiced concern about one of my earlier posts.

(cartoon from XKCD)

6 comments:

Anonymous said...

Correlation does not imply causation.

Neil said...

However, if you except the principles of causality, and also except that correlation can be reliably measured, then the demonstration of a correlation does indicate the presence of some underlying causal relationship. It is just that the relationship needn't be as simple as A causes B.

Anonymous said...

Neil: "if you except the principles of causality.."

Except? Accept?

Neil said...

Should be 'accept', in both cases. Brainfart on my part.

dearieme said...

In my fresher stats lectures a million years ago we were told about the near-perfect correlation, over many decades, between the salaries of ministers of religion in New England and the price of cigar tobacco in Cuba. A good anecdote sticks around - as that fine cartoon may.

look said...
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