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munny 11-12-2009, 05:19 PM Valid question. My assumption would be that they are all half point games. For example, Denver is favored by 3.5 right now over the Skins. No ties possible.
As a footnote for my fellow degenerates - Washkington is 2-6 against the spread. 0-4 both on the road and as a favorite. So, if you bet the other team, you are making money 75% of the time. Better than the market!
hooskins 11-12-2009, 05:25 PM thats .5^12 then right. If the prob of winning each game is 50 percent.
cpayne5 11-12-2009, 05:36 PM thats .5^12 then right. If the prob of winning each game is 50 percent.
No. 2 possible outcomes for 12 games. 2^12. .5^12 is a tiny number. ;)
Adding a tie to the mix changes the numbers significantly. You could use your judgment to minimize the risks of a tie, though, but the results wouldn't be a sure thing, obviously. ie, you may lose a ton of money. :)
Hijinx 11-13-2009, 01:06 AM The answer is 42, but I don't know what the question is.
JoeRedskin 11-13-2009, 06:25 AM The answer is 42, but I don't know what the question is.
Ask the mice.
Schneed10 11-13-2009, 10:23 AM Math nerd to the rescue. The first assumption is that you have a 50% chance of getting a game right against the spread. Over the long haul that's about right.
In any given week, if you pick 12 games and select randomly, you have a 1 in 144 chance of getting all 12 games right (12 games raised to the power of 2, because each game has 2 possible outcomes). That translates to 0.7% chance of succeeding each week.
If you put $12.50 in to play that week, then the expected return is $1800. In other words, if the prize for that week is more than $1800, then the house is losing money, and you could arbitrage the opportunity by buying up all 144 possible combinations. (= 12.50 / 0.7%) If the prize for that week is less than $1800, then you'd lose money by buying up all 144 combinations.
But I'm pretty sure a 12x12 box means you need to get 12 games right every week for 12 weeks in a row. Odds of that happening are 1 in 20,736 ( = (12 * 12)^2). That translates to a percentage chance of winning: 0.0048%.
If you pay $12.50 per week to play for 12 weeks, so a total of $150, the expected return would be $3.1 million (= $150 / 0.0048%). So if the house is giving away $1 million as a prize, they're making out real well on the deal. Assuming they can drum up enough participants to cover it. By buying up all 20,736 combinations, and thus guaranteeing yourself a win, you would lose $2.1 million.
Not to mention the possibility of someone else lucking into a winning combination. What if you have to split that million dollar prize with someone?
There was a prominent company that tried to arbitrage the Mega Millions lottery. They did the math and figured that if they bought every combination possible, they'd make out on the deal. The math was right, and they did win, but they forgot to factor in both the taxes they'd have to pay and the possibility that they'd split the pot. There was one other winner, and then they had a tax bill. The people who made this decision were fired. Wish I could remember who and when it was, but my statistics professor loved to tell that story.
Schneed10 11-13-2009, 10:24 AM If you need me to change the assumptions in any way, I can adjust the calculation easily. Perhaps the entry fee is different, or I'm not understanding the rules of the game, or whatever. Correct me if I'm making the wrong assumptions.
cpayne5 11-13-2009, 10:57 AM Math nerd to the rescue. The first assumption is that you have a 50% chance of getting a game right against the spread. Over the long haul that's about right.
In any given week, if you pick 12 games and select randomly, you have a 1 in 144 chance of getting all 12 games right (12 games raised to the power of 2, because each game has 2 possible outcomes). That translates to 0.7% chance of succeeding each week.
If you put $12.50 in to play that week, then the expected return is $1800. In other words, if the prize for that week is more than $1800, then the house is losing money, and you could arbitrage the opportunity by buying up all 144 possible combinations. (= 12.50 / 0.7%) If the prize for that week is less than $1800, then you'd lose money by buying up all 144 combinations.
But I'm pretty sure a 12x12 box means you need to get 12 games right every week for 12 weeks in a row. Odds of that happening are 1 in 20,736 ( = (12 * 12)^2). That translates to a percentage chance of winning: 0.0048%.
If you pay $12.50 per week to play for 12 weeks, so a total of $150, the expected return would be $3.1 million (= $150 / 0.0048%). So if the house is giving away $1 million as a prize, they're making out real well on the deal. Assuming they can drum up enough participants to cover it. By buying up all 20,736 combinations, and thus guaranteeing yourself a win, you would lose $2.1 million.
Not to mention the possibility of someone else lucking into a winning combination. What if you have to split that million dollar prize with someone?
There was a prominent company that tried to arbitrage the Mega Millions lottery. They did the math and figured that if they bought every combination possible, they'd make out on the deal. The math was right, and they did win, but they forgot to factor in both the taxes they'd have to pay and the possibility that they'd split the pot. There was one other winner, and then they had a tax bill. The people who made this decision were fired. Wish I could remember who and when it was, but my statistics professor loved to tell that story.
What does a "guess" consist of? My assumption is...
You have 12, and only 12, spots to play in each guess. Each spot can have 2 results. The number of unique "guesses" is 2^12.
Schneed10 11-13-2009, 11:52 AM What does a "guess" consist of? My assumption is...
You have 12, and only 12, spots to play in each guess. Each spot can have 2 results. The number of unique "guesses" is 2^12.
Oh jeez, you're right. Me = fail. Not one in 144 like I said, it's one in 4096.
Pay in $12.50 for that week, the expected payoff for that week is $51,200.
Oh jeez, you're right. Me = fail. Not one in 144 like I said, it's one in 4096.
Pay in $12.50 for that week, the expected payoff for that week is $51,200.
See? Give yourself more credit! You just thought you were a nerd!
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