Date: Thu, 22 Feb 2001 20:34:28 +0100

Author: Urs Lauterburg

Subject: Re: hexstat

Post:

Sam,

I always thought that this is called a Galton-board. At least that is what
we call it here. We once have build a whole bunch of these but somehow had
problems to really get the theoretical distribution, even after very many
times filling the bins.

It looks as if very slight irregularities leading to a subtile asymmetric
geometry will spoil the proper distribution.

Statistics are though stuff

Regards

Urs

Urs Lauterburg
Physics edutainer
University of Bern
Switzerland


>Sammy Wammy,
>
>A Hexstat is a board with little balls and a sequence of bumpers. When
>tilted upright the balls fall through successive bumpers and drop into
>little buckets to show a binomial distribution.
>
>You can see one at:
>http://www.physics.brown.edu/Studies/Demo/solids/demos/1a2011.html
>
>At 01:06 PM 2/22/2001 -0500, you wrote:
>>What is a hexstat?? I think I have 6 of them, right now!
>>
>>Sam
>>
>>Gerald Zani wrote:
>>
>> > Folks,
>> >
>> > Anyone know where to buy a Hexstat today?
>> >
>> > Jerry
>> >
>> > Gerald Zani
>> > Manager of demonstrations
>> > Department of Physics
>> > Brown University
>> > Box 1843
>> > Providence, RI 02912
>> > (401)863-3964
>> > Gerald_Zani@brown.edu
>> >
>> > http://www.physics.brown.edu/users/staff/zani/index.html
>> > http://www.physics.brown.edu/Studies/Demo/
>> >
>> > Do a little more of that work which you have confessed to be good,
>> > which you feel that society and your most Just Judge rightly demand of
>>you.
>> > Cultivate the tree which you have found to bear fruit in your soil.
>> > If you have any experiments you would like to try, try them.
>> > Now's your chance.
>> > Henry David Thoreau, Journal entry, 1850.


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