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Re: Re: Re: Re: check my logic & a random number issue

by rmckillen (Novice)
on Oct 11, 2002 at 17:21 UTC ( [id://204589]=note: print w/replies, xml ) Need Help??


in reply to Re: Re: Re: check my logic & a random number issue
in thread check my logic & a random number issue

If you look at the dice rolls that generate these losses you'll find that they're all different.

Jarich: I think that explains the issue I was seeing. You can lose with a craps roll on the come out roll, and then win the next round with a winning odds bet on a 6 OR a winning odds bet on an 8, and the net win will still be the same. Basically different roll combinations are likely to yield the same net win/loss result. I'm sure I'll find some to be fairly common.

Daruma: Thanks for putting up the results of Math::Random vs. int(rand). When you look at the probabilities of the various outcomes, and compare them with the actual real-life probabilities, although they both have fairly normal distributions, the Math::Random yields a better result.

Math::Random int(rand) roll occ prob roll occ prob 2 271 2.71% 2 270 2.70% 3 533 5.33% 3 606 6.06% 4 876 8.76% 4 849 8.49% 5 1129 11.29% 5 1172 11.72% 6 1364 13.64% 6 1362 13.62% 7 1640 16.40% 7 1632 16.32% 8 1390 13.90% 8 1402 14.02% 9 1101 11.01% 9 1079 10.79% 10 876 8.76% 10 838 8.38% 11 540 5.40% 11 535 5.35% 12 280 2.80% 12 255 2.55% real life roll prob 1 2.78% 3 5.56% 4 8.33% 5 11.11% 6 13.89% 7 16.67% 8 13.89% 9 11.11% 10 8.33% 11 5.56% 12 2.78%
Thanks for all the help so far. Now I guess it comes down to a random number issue. Are there any perl modules, or different techniques I can use to get the rolls as random and close to real-life as possible, or is Math::Random likely as good as it will get?

Thanks for the continued help!

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