matz:
> > You've found the second (?) bug in the Dave&Andy's book.

Dave: 
> Oh, there are more than that...
>    http://www.pragmaticprogrammer.com/ruby/errata.html

Well, it's probably just within any statistical test, but otherwise it seems
people read your book only from the beginning or from the end, but no one
jumps in (the middle) :). OTOH, the end isn't around 500 pages IIRC...

	- Aleksi