There is a java applet by David Krider at the RAND Corporation on the Web at:
http://www.rand.org/centers/stat/applets/clt.html
which does this.
Jon Cryer
At 09:26 AM 2/17/00 -0500, you wrote:
>
>
>One of the things I really enjoy about this list is how much I learn from
>it. Thanks to everyone who recommended Professor Stigler's book,
>Statistics on the Table: The History of Statistical Concepts and Methods.
>I just finished reading it. What a delightful collection of
>erudite essays.
>
>On p. 151, and again on p. 179, Stigler discusses Galton's "probability
>machine" (the Quincunx). Stigler comments that he tried to build one,
>and found it very hard to do (see fig. 9.2 on p. 179). I can
>understand why it would be hard to construct a working model. If one of
>the nails or pins was slightly off, it would throw off the resulting
>distribution. (not exactly what I would want to show my students...)
>
>But it also seemed to me that it would be easy to do using a graphics
>program. Surely in these days of computer-games there must be some
>pinball game, or something like the Japanese Pachinko, that could serve as
>a starting point.
>
>So my question is, does anybody know of a Quincunx program, and if so how
>would I find it/get a copy/ etc.?? I don't think I can take the time
>right now to write the program myself, and besides, there may be one
>already out there...
>
>TIA.
>
>Mike
>
>
>
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Jon Cryer [EMAIL PROTECTED] ( )
Department of Statistics http://www.stat.uiowa.edu\ \_ University
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This list is open to everyone. Occasionally, people lacking respect
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