Have I ever mentioned on this list that I worked REALLY REALLY hard in my calculus class, just to pass with a C by actually understanding what I could and not just rote memorization? Given that, and that it was 30 years ago, I hate to say it, but this last article had A LOT in common with the ceiling: it is way over my head.
Annette Annette Kujawski Taylor, Ph.D. Professor of Psychology University of San Diego 5998 Alcala Park San Diego, CA 92110 619-260-4006 [EMAIL PROTECTED] ---- Original message ---- >Date: Mon, 17 Sep 2007 13:03:06 -0700 >From: Don Allen <[EMAIL PROTECTED]> >Subject: Re: [tips] odds of same birthday calculation >To: "Teaching in the Psychological Sciences (TIPS)" <[email protected]> > > Here's more than you ever wanted to know about this > problem. I've attached the paper as a pdf but if it > doesn't come through you can go to > http://stat-www.berkeley.edu/cgi-bin/index.cgi?id=25 > Th paper is called: Asymptotics for k-fold repeats > in the birthday problem with unequal probabilities > > -Don > > Claudia Stanny wrote: > > Jim's solution, finding how many people are needed for the probability > that no one shares a birthday exceeds 50% (or any other cutoff value), > is the one typically presented to solve the birthday problem (Google > "birthday problem probability" for more web sites than you will want to > examine). > > The problem gets trickier if the question is 3 shared birthdays. Anyone > care to tackle this one? > > Claudia J. Stanny, Ph.D. > Director, Center for University Teaching, Learning, and Assessment > Associate Professor, Psychology > University of West Florida > Pensacola, FL 32514 - 5751 > > Phone: (850) 857-6355 or 473-7435 > e-mail: [EMAIL PROTECTED] > > CUTLA Web Site: http://uwf.edu/cutla/ > Personal Web Pages: http://uwf.edu/cstanny/website/index.htm > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Monday, September 17, 2007 12:47 PM > To: Teaching in the Psychological Sciences (TIPS) > Subject: [tips] odds of same birthday calculation > > Can someone tell me the formula for calculating the probability of two > students in a class having the same exact birthdate? > > What about THREE in a class of 20? > > Thanks > > Annette > > > Annette Kujawski Taylor, Ph.D. > Professor of Psychology > University of San Diego > 5998 Alcala Park > San Diego, CA 92110 > 619-260-4006 > [EMAIL PROTECTED] > > --- > > --- > > > -- > Don Allen > Department of Psychology > Langara College > Vancouver, B.C., Canada > V5Y 2Z6 > > 604-323-5871 > > --- > To make changes to your subscription go to: > http://acsun.frostburg.edu/cgi-bin/lyris.pl?enter=tips&text_mode=0&lang=english >________________ >524[1].pdf (218k bytes) ---
