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Q&A #101

Teachers' Lounge Discussion: Graphing Calculator Courses

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From: Loyd <loydlin@aol.com>
To: Teacher2Teacher Public Discussion
Date: 2002112707:14:46
Subject: Re: Re: Casio Calculator for kids; Rnd function

On 2002112620:47:06, Tony Smith wrote:
>Can anyone tell me what the Rnd function on a Casio FX82TL does and
>how it works?
>

I don't have that calculator but the rnd function on most calculators
returns a random number such as .6823421 or something like that.  Each
time you use it, it should be a different.  

For example, suppose you wanted to select from a pool of 100 kids in
an unbiased way.  You could say, "I will use the rnd function and if
the leading two digits are .00 then I will select kid 100.  If the
leading two digits are .68 then I will select kid numbered 68.  

You could repeat that process until all kids are selected. This method
is an unbiased way to select. 

 Lots of mathematics Monte Carlo models use random digits.  





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