[EL] McDonald study, birthdate distribution in real voter list

[Justin Levitt]

Nope.  That's month, day, year: 180 people gives you a 50-50 chance of 
the same date of birth, year included.

For month and day, without year, it's just 23 people in a "room" with a 
50-50 chance that two of them share the same birthday.

Feels counter-intuitive, but both the stats and the simulations back it up.

Justin

On 9/11/2011 11:28 AM, Bev Harris wrote:
>> if you've got 180 voting-age people in a "room", there's a 50% chance that two
> of them will share the same date of birth.
>
> Omitting the year, right? That's a huge omission and it changes everything.
>
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-- 
Justin Levitt
Associate Professor of Law
Loyola Law School | Los Angeles
919 Albany St.
Los Angeles, CA  90015
213-736-7417
justin.levitt at lls.edu
ssrn.com/author=698321