Re: Dice
Re: Dice
- Subject: Re: Dice
- From: Bill Briggs <email@hidden>
- Date: Tue, 26 Oct 2004 23:23:32 -0300
At 9:56 PM -0400 10/26/04, Graff wrote:
On Oct 26, 2004, at 3:39 PM, John C. Welch wrote:
On 10/26/2004 13:28, "Graff" <email@hidden> wrote:
So no, it doesn't seem to be perfect but it's probably good enough
for most applications.
Out of curiosity, what would the std deviation be if the random was
perfect?
A perfectly even distribution would be for every value to show up the
same number of times. In that case the std deviation would be 0.
However, a perfectly even distribution is not, by definition, perfectly
random, or even close.
Well a fairly even distribution over the long term is a semi-decent
indicator of randomness. Of course it doesn't necessarily mean that
the sample is random as you can have even distributions that are not
random.
Check this out. It's a lottery called 6/49. The numbers come out of
one of those bingo cage things full of little balls. No digital
technology involved. Note the unevenness of the histogram, even
considering that there are a few hundred draws in the data. It should
be a good random process, btu the histogram is not "evenly
distributed".
http://lottery.sympatico.msn.ca/cgi-bin/english?job=frequency_chart&lottery_name=na_lotto_649&order=0&years=0
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| References: | |
| | >Re: Dice (From: "John C. Welch" <email@hidden>) |
| | >Re: Dice (From: Graff <email@hidden>) |