it's been ages since i've had to use this, but i was wondering how to apply this to a game we play that involves rolling many, many dice.
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math guys: how does one figure out a standard deviation
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math guys: how does one figure out a standard deviation
I wasn't born with enough middle fingers.
[Brandon Roderick? You mean Brock's Toadie?][Hanged from Yggdrasil]Tags: None
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unfortunately i don't have access to a laptop when i'm playing a game. i need to be able to figure out if a set of rolls is within one or not more or less on the fly.I wasn't born with enough middle fingers.
[Brandon Roderick? You mean Brock's Toadie?][Hanged from Yggdrasil]
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i dont see how you can apply this to a game of rolling the dice many times. since the expected value of each roll is 3.5, an infinite number of rolls will lead to a standard deviation of zero (by Central Limit Theorem)
similarly, a large number of rolls (say 100) will also get you a standard deviation that will approach zero (by Law of Large Numbers)"Everything for the State, nothing against the State, nothing outside the State" - Benito Mussolini
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The population standard deviation can be simply calculated as follows:
1) sum all values
2) sum the squares of all values
3) square the result from (1)
4) Divide (3) by N (the number of values)
5) Subtract (4) from (2)
6) Divide (5) by N
7) Take the square root of (6)
So, if we have 3, 6, and 7 as values:
1) = 3+6+7 = 16
2) = 9 + 36 + 49 = 94
3) = 16*16 = 256
4) = 256/3 = 85.33
5) = 94 - 85.33 = 8.67
6) = 8.67/3 = 2.89
7) = SQRT(2.89) = 1.712-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
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Originally posted by Lawrence of Arabia
i dont see how you can apply this to a game of rolling the dice many times. since the expected value of each roll is 3.5, an infinite number of rolls will lead to a standard deviation of zero (by Central Limit Theorem)12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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Would you like to make any more absurd statements about basic statistical concepts, Lawrence?12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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Originally posted by Lawrence of Arabia
uuuuh yeah.
SE = Stdev/sqrt(n)12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
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Let's make this absolutely clear: you are claiming that the standard deviation of any set of independent dice rolls approaches 0 as the size of the set approaches infinity?12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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Originally posted by Lawrence of Arabia
oh, one more thing. you proved my point in your previous post
6) Divide (5) by N
7) Take the square root of (6)
what happens when n=100. when n= 1000? when n= 10000
12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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Do all economists receive such a poor education in statistics, or are you particularly dimwitted?12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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