From: "Alan Miller" <amiller @ vic.bigpond.net.au>
Subject: Re: statistics (really probability)
Date: Sat, 20 Mar 1999 08:49:50 +1100
Newsgroups: sci.math.num-analysis
Keywords: example of hypergeometric distribution

Look up the hypergeometric distribution in a textbook on probability
distributions.

--
Alan Miller, Retired Scientist (Statistician)
CSIRO Mathematical & Information Sciences
Alan.Miller -at- vic.cmis.csiro.au
http://www.ozemail.com.au/~milleraj
Edward de Leau wrote in message <36F26211.1568@student.kun.nl>...
>We had a discussion during lunch, nobody knew the exact
>answer (this is a long time ago):
>-------------
>given:
>
>- 50 blue balls
>- 700 red balls
>
>we take 50 out of a hat, what are the chance that there are
>0,1,2,3 etc... blue balls in this first 50. (we dont put the items back)
>
>So we want to create a table for chances for 0-50 correct ones
>with their chances.
>--------------------------
>I think it becomes something like (eg 4):
>a correct one on 1 * on 2 * on 3 * on 4 * incorrect ones on other
>( 50/750 + 49/749 + 48/748 + 47/474 + 700/473 ...etc) +
>a correct one on 1 * on 2 * on 4 * on 5 * incorrect ones on other +
>etc... and then divided by all possibilities ? and this for
>each number of items or ... ?
>--------------------------
>can anybody help me out or refer me to a website or a
>c-program or something ??
>tanx !!!
>
>
>
>Edward de Leau
>Sophiaweg 52 6523NJ Nijmegen tel: (+31) (0)24 - 3888328
>Buzzer: 06-65241072 Email: edelwater@mail4u.nl ICQ: 5760649
>______________________ http://catv7040.extern.kun.nl ________