Simpson’s Paradox

A quick link to a sort of geeky piece which tells all about an interesting possible effect when you combine two sets of data: a positive trend and a positive trend, when combined, may show a negative trend. It’s a very worthwhile piece of information to store away for a rainy day, or when a politician or consultant presents something you know in your heart might not quite be right.

It’s at the Register:

What can The Simpsons teach us about stats algorithms? Well, since you ask…