calculation

Maths of coincidence

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In What are the chances? we saw how the chance of a rare event occurring could be calculated for specific problems.

Author(s): 
David Spiegelhalter

Three children with the same birthday?

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A recent news story featured a family whose three children had all been born on January 29th. But is this so remarkable?

Author(s): 
David Spiegelhalter

Maternal death coincidence?

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Two women admitted to the maternity unit of the Royal Hampshire hospital on December 21st 2007 died of Streptococcus A infections within two days, one on December 23rd and one a day later. In a BBC News article the hospital said "their deaths appear to be coincidental".
So what is the chance of such an event happening by chance alone?

Author(s): 
David Spiegelhalter
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