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Seven things everyone wants to know about the universe
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What would you like to know about your universe?

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Andy Green is gearing up to break the land speed record in his rocket powered car Bloodhound SSC

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September 2009
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Simpson's Paradox

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Did you know that you can't average averages? Or that Paris is rainier than London ... but it rains more in London than in Paris? Andrew Stickland explores the dangers that face the unwary when using a single number to summarise complex data.

Tags: statistics : probability : average : correlation : paradox : Simpson's Paradox : mean : median : outlier