Branching off from "Is Random Really Random", one might expect that a
look through a list that included apparently random numbers, say the
street addresses in the phone book1,2, that the totals for
each of the ten digits would be approximately equal. The expectation
would be wrong because each digit position within a number starts
with "1" but does not necessarily reach "9" or "0" or the numbers in between.
(1) The phone numbers are excluded because they are biased by the use of exchange numbers.
(2) Assuming that the numbers run continuously and do not re-start at each block, as they do in many American cities.