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"Mathematical Probability vs. Probability Deity." Topic


11 Posts

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837 hits since 25 Feb 2017
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Comments or corrections?

sillypoint25 Feb 2017 4:10 p.m. PST

I'm thinking of giving up mathematical probability.
For example, rolling 2d6 and achieving a 10+ result. My middle school maths says 10/36 about 28%, rolling 10+ result in two consecutive rolls about 7%, in 3 consecutive rolls about .02%.
I'm open for corrections 😜
Well in several games recently, 10+ result was the sweet spot The results I acheived makes me think I should make offerings to an appropriate Deity, and rely less on logical thought.

Wretched Peasant Scum25 Feb 2017 4:33 p.m. PST

It's 6/36 or 16.7%

two rolls 2.8%

three .46%

sillypoint25 Feb 2017 4:42 p.m. PST

So, I must be thinking 9+..😬

Early morning writer25 Feb 2017 4:52 p.m. PST

Shh, don't tell anyone but I'm the PD you seek. You only need to make an appropriate sacrifice – cash accepted, large quantities expedite – and all your dice rolls will be winners forever more.

Oh, and you have to make three box cars rolls in a row on a pair of average dice.

See how easy that is.

sillypoint25 Feb 2017 9:30 p.m. PST

Actually, who is your Wargaming probability Deity?
The other evening, when we were playing Gods and Mortals, I called on Athena. 😁

MHoxie26 Feb 2017 3:24 a.m. PST

Joe Pesci. Call on him too many times, however, and he'll send someone over to break your fingers.

Personal logo etotheipi Sponsoring Member of TMP26 Feb 2017 5:39 a.m. PST

Here's the table for one d6 plus another d6 (I assume that's what you mean … adding them together):


1 2 3 4 5 6
1 2 3 4 5 6 7
2 3 4 5 6 7 8
3 4 5 6 7 8 9
4 5 6 7 8 9 10
5 6 7 8 9 10 11
6 7 8 9 10 11 12

If by 10+, you mean ten or greater, it is, as Jericho Smith asserts, it is six out of thirty-six. (One of) The ten out of thirty-six is nine or greater.

Doing the tables by hand for up to four six-sided dice is fairly quick and easy. Plus, writing them out by hand gives you a kind of visceral insight into the underlying patterns.

(Phil Dutre)26 Feb 2017 12:25 p.m. PST

It's not becaue some event has a low probability it will not happen. Of course it will happen, exactly with a frequency predicted by the computed probability.

Only a few individuals will observe that rare occurance, and then conclude the probabilities must be wrong.

A lottery winner who participated only once might also conclude winning the lottery is close to 100%.

Great War Ace26 Feb 2017 12:45 p.m. PST

The 2D6 spread is c. 2.8 percent between each number, as a chance of rolling that number, starting at either end: snake eyes or boxcars are both a 2.8% chance of coming up across a random selection of dice rolls (on any single roll, the chance of any given number coming up is identical). So, 2 = 2.8; 3 = 5.6; 4 = 8.3; 5 = 11.1; 6 = 13.9; 7 = 16.7; 8 = 13.9; 9 = 11.1; 10 = 8.3; 11 = 5.6; 12 = 2.8.

The chance of rolling 9+ is c. 27.8%, across a series of 2D6 rolls…………….

Early morning writer26 Feb 2017 10:54 p.m. PST

And, more seriously, you can find a variety of probability calculators on this internet thingy.

Phil DAmato27 Feb 2017 9:30 a.m. PST

Don't forget that the probability goes up with dice throwers under a certain age. I ran a game once where a young gamer, had to be about 8 or 9, was doing my AA rolls for Check Your 6!. He needed an 11 or 12 on 2d6. Boy did he roll. 11 out of 16 rolls were 11+. That game was over quickly.

Phil

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