Forum: Health and Fitness
11-30-2007, 01:03 PM
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Replies: 35
Views: 1,146
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Forum: Other Other Topics
11-26-2007, 01:39 AM
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Replies: 56
Views: 1,270
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Forum: Video Games
11-24-2007, 02:17 PM
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Replies: 20
Views: 288
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Forum: Science, Math, and Philosophy
11-24-2007, 02:08 PM
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Replies: 2
Views: 113
Re: Wiener Process
If W(0) = 0, then W(1) = X_1, where X_1 ~ N(0,1), and W(t) = X_1 + ... + X_t where X_i ~ N(0,1). The sum of t iid normal RVs is normal with mean 0 and variance t, so W(t) ~ N(0,t) which is the same...
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Forum: Science, Math, and Philosophy
11-23-2007, 12:44 AM
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Replies: 11
Views: 203
Re: Simple storage problem (math)
For the first 5 bits of the disc, map the integers to whether they are prime or not
integers: 1 2 3 4 5
is prime? 0 1 1 0 1
After that, you kill all multiples of 2, 3, and 5
1/2 of all...
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Forum: Student Life
11-21-2007, 03:00 PM
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Replies: 3
Views: 123
Re: Microeconomics Question
Yeah, tabako's right. Maybe to be a little bit more clear,
d^2e / (dp_i*dp_j) = d/dp_i * de/dp_j = d/dp_i * h*_j = dh*_j / dp_i
And since d^2e / (dp_i*dp_j) = d^2e / (dp_j*dp_i) = d/dp_j *...
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Forum: Other Other Topics
11-20-2007, 07:09 PM
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Replies: 123
Views: 1,613
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Forum: Science, Math, and Philosophy
11-06-2007, 01:09 AM
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Replies: 5
Views: 85
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Forum: Probability
11-01-2007, 04:26 PM
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Replies: 23
Views: 290
Re: A tough variance problem (at least for me)
I just ran some simulations, but they were a 5 minute hack job, so let me know if you spot any mistakes. Still, I hope they shed some light on the problem.
#Let's just say you win a $3.22 with...
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Forum: Probability
11-01-2007, 01:24 PM
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Replies: 23
Views: 290
Re: A tough variance problem (at least for me)
[ QUOTE ]
I am no guru in statistics, but I think you can multiply your std by the swing hand amount to get std of profit for the amount of hands you are talking about.
[/ QUOTE ]
It's the...
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Forum: Probability
09-21-2007, 08:50 PM
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Replies: 25
Views: 206
Re: Hole in one odds from Yahoo news story
Here's another possibility. They have a distribution for golfers' ace abilities. For example, take 4 golfers, A-D. For simplicity, assume that they golf in the order A, B, C, D. Take A's ace...
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Forum: Probability
09-21-2007, 02:42 PM
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Replies: 25
Views: 206
Re: Hole in one odds from Yahoo news story
5000:1 means 1/5001. Assuming independence gives (1/5001)^2 * (5000/5001)^2 * 3 = 25000000/208500050006667 = 1.19904x10^-7
17mil:1 = 5.88235x10^-8
Edit: there's no stipulation that the other 2...
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Forum: Probability
09-19-2007, 12:47 AM
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Replies: 6
Views: 91
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Forum: Probability
09-17-2007, 06:16 PM
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Replies: 6
Views: 91
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Forum: Probability
09-12-2007, 01:48 PM
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Replies: 12
Views: 139
Re: Test Strategy/Argument
Let's just say that having absolutely no idea is the same as randomly guessing (pick each of the 5 answers with probability 1/5). So, by randomly guessing your expected score is going to be 0. Why...
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Forum: Probability
08-22-2007, 02:11 PM
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Replies: 16
Views: 130
Re: Chances of only ever getting 72o
Okay, consider this. We can only get 72o if we get 7 and 2 not of the same suit. There are 4 7s and 4 2s and 4 combos where they are of the same suit, so there are 12*2(12 is just 7 and 2, there...
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Forum: Probability
08-22-2007, 02:03 PM
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Replies: 16
Views: 130
Re: Chances of only ever getting 72o
[ QUOTE ]
So, thinking about it it is possible that your lifetime, you only ever get delt 72o.
But if you got a person to sit down and reshuffle and redeal, youd never (literally never? no, just...
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Forum: Student Life
08-16-2007, 05:36 PM
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Replies: 18
Views: 213
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Forum: Probability
08-15-2007, 10:15 PM
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Replies: 8
Views: 85
Re: Probability question
[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
What would be the expected number of places up or down in the draft order for a team to move given random drawings (can one even determine this)?
[/ QUOTE ]
In...
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Forum: Probability
08-15-2007, 03:15 PM
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Replies: 8
Views: 85
Re: Probability question
12c5 * 7!/12! double counts some combos, but the answer is probably pretty close. I think you probably need some sort of inclusion exclusion.
Suppose the 5 chosen were 1, 2, 3, 4, 5, and 6-10 ended...
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Forum: Internet Gambling
07-30-2007, 10:47 AM
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Replies: 34
Views: 302
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Forum: Health and Fitness
07-21-2007, 01:13 PM
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Replies: 193
Views: 3,460
Re: SmileyEH\'s Log
[ QUOTE ]
Eff the haters. Dip and rip.
[/ QUOTE ]
What the [censored] does that even mean?
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Forum: Probability
07-21-2007, 02:50 AM
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Replies: 15
Views: 151
Re: Any math wizards out there?
Of course it changed the odds. The most noticeable differences would be that it's much more likely to get a set of kings and possible to get even 5 or 6 of a kind with kings. Since there are now...
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Forum: BBV4Life
07-21-2007, 02:26 AM
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Replies: 3
Views: 72
Beat: Obesity
http://www.breitbart.com/article.php?id=070720210958.nxif5zgw&show_article=1&image=large
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Forum: Health and Fitness
07-21-2007, 01:33 AM
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Replies: 19
Views: 323
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