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| | Coin flipping - Wikipedia, the free encyclopedia |
 | | During coin flipping the coin is "flipped into the air", i.e., caused to both rise and rotate about an axis parallel to its flat surfaces. | | | Although it is extremely rare, there is an extremely slight possibility that a coin will come to rest on its edge (estimated at roughly 1/6000 for a U.S. nickel.) If the coin remains on its edge, while it may cause temporary distraction, the only fair course of action would be to toss the coin again. | | | Coin tossing is popular because it is fast, more or less fair, and requires nothing but a little spare change. |
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http://en.wikipedia.org/wiki/Coin_flipping
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| | Coin - Wikipedia, the free encyclopedia |
| | Traditionally the side of a coin carrying a bust of a monarch or other authority, or a national emblem, is called the obverse, or colloquially heads. | | | By replacing some fraction of a coin's precious metal content with a base metal (often copper or nickel), the intrinsic value of each individual coin was reduced (thereby "debasing" their money), allowing the coining authority to produce more coins than would otherwise be possible. | | | The milled edges still found on many coins were originally designed to show that none of the valuable metal had been shaved off the coin. |
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http://en.wikipedia.org/wiki/Coin
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| | Novelty coin flipping device - Patent 4061338 |
| | When the coin 40 flips upward, and because it is starting from an angularly disposed position, the coin will flip over and over from its "heads" position to its "tails" position and back to its "heads" position during the time that the coin continues to rise in the tubular member. | | | The present invention has as its objective the provision of a coin flipping device which actually uses a coin and wherein the coin is visible before, during and after the flipping operation. | | | A novelty coin flipping device as defined in claim 1 wherein the diameter of said tubular member is no more than 25 percent greater than the diameter of said coin. |
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http://www.freepatentsonline.com/4061338.html
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| | Muse: Flipping a Coin |
| | Because you expect that the coin is as likely to come up heads as tails, it sounds like a fair way to make a choice. | | | You probably knew some tricksters use a two-headed coin and some magicians have learned how to flip a coin so it always comes up heads. | | | As a result, the coin tends to fall over with the head on top. |
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http://www.sciencenewsforkids.org/pages/puzzlezone/muse/muse0403.asp
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| | FLIPPING A COIN (# HEADS VS. # TAILS) |
| | Response: It is true that if you flip a coin many, many times, the proportion of heads and the proportion of tails should both approach 50%. | | | Suppose I flip a coin 100 times and get 40 heads and 60 tails. | | | Is it reasonable to assume that if I flip the coin another 100 times, then I should expect to get more heads than tails because after 200 flips, I should get around 100 heads and 100 tails? |
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http://www.herkimershideaway.org/writings/htcoin.htm
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| | Toss Out the Toss-Up: Bias in heads-or-tails: Science News Online, Feb. 28, 2004 |
| | Since the coin never actually flips, it is guaranteed to land on the same face that it started out on. | | | What's more, the coin's spin makes it wobble, often creating the illusion that the coin has flipped. | | | For a wide range of possible spins, the coin never flips at all, the team proved. |
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http://www.sciencenews.org/articles/20040228/fob2.asp
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| | An Accidental World |
| | The simple, idealized model is a decent first approximation to coin flips in real life. | | | This model is extremely simple: each individual coin flip is independent of any other, and totally unpredictable. | | | A quantum coin is simple: if we flip it, we get a result which is equally likely to be heads or tails. |
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http://www2.truman.edu/~edis/writings/articles/coin.html
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| | Ivars Peterson's MathTrek - Heads or Tails |
| | Each flip depends on the impulse given the coin by the thumb and the height above the floor from which the coin starts. | | | Keller showed that, for large values of the initial velocity, the sets of initial velocity values that lead either to heads or to tails are of equal size for a fair coin. | | | A look at the spread in the way real people flip real coins indicates that heads and tails would each come up about half the time. |
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http://www.maa.org/mathland/mathtrek_03_01_04.html
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| | Science News: Taking no chances - predicting supposedly random behavior such as coin flipping |
| | Their example is the flipping of a coin. | | | Expressing surprise that it has taken three centuries to figure the contrary, Vulkovic and Prange argue that coin flipping obeys Mewton's laws, and that each flip depends on the impulse given the coin by the thumb and the height above the floor from which the coin starts. | | | If you could know the impulse given by the thumb in a particular case, or had a well-calibrated mechanical flipper, you could predict how the coin would fall (ignoring effects of the air and assuming a perfectly flat floor). |
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http://www.findarticles.com/p/articles/mi_m1200/is_v127/ai_3720678
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| | ► » Imagine a coin flipping tournament |
| | average of all contestants' "flip length", which is, of course, | | | average of all contestants' "flip length", which is, of course, |
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http://www.science-chat.org/Imagine-a-coin-flipping-tournament-8671195.html
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| | Ephilosopher :: Philosophy of Religion Forum :: The mysterious result of coin flipping! |
| | But most were sceptical, because sometimes it doesn't work if they are flipping the coin for my 'order' too, which meant to them that it was my specialty that flip the coin correctly to their likeness. | | | I will now, (I'm actually gonna do this...) flip a coin 50 times. | | | You WILL GET what you want after the coin being flipped!. |
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http://www.ephilosopher.com/phpBB_14-action-viewtopic-topic-2362.html
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| | Coin flipping |
| | Hi, I have a coin flipping contest which was on TV tonight... | | | = = Hi, = = = = I have a coin flipping contest which was on TV tonight... | | | = Hi, = = I have a coin flipping contest which was on TV tonight... |
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http://www.thehelparchive.com/new-2298532-278.html
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| | [No title] |
| | As the number of times the coin is flipped increases, the graph shows the percentage of heads out of all flips. | | | Initially it may be some distance of from the midpoint at 1/2, but as the number of flips gets larger and larger, the tendency is always for the graph to approach the line. | | | Click the reset button in the top left corner to set the count back to zero. |
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http://www.wiley.com/college/mat/gilbert139343/java/java04_s.html
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| | Hypothesis Testing |
| | n=100 and p=P(getting a head on a single flip)=.5 (assuming the coin is fair). | | | So the question is: how likely is it he gets 75 or more heads if the coin is fair? | | | So now I'm ready to face the guy. |
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http://www.nova.edu/~hammack/stat/hyptest/a1.html
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| | Citations: Coin flipping by phone - Blum (ResearchIndex) |
| | Commitment schemes are a basic building block and are used in the construction of many protocols. | | | Clearly, combining a secure coin flipping protocol (cf. | | | Citations: Coin flipping by phone - Blum (ResearchIndex) |
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http://citeseer.ist.psu.edu/context/360004/0
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| | Coin buffs flipping over mutants of Wis. quarters The Arizona Daily Star ® |
| | The rare coins appear to have an extra leaf on the cornstalk, one variety curving up and one curving down. | | | We've created 50,000 new coin collectors and about 200 or 300 new coin dealers, too," he said. | | | The unusual Wisconsin coins have been so popular that Palser said he has seen people buy them from his shop and turn around and sell them on eBay at a large profit. |
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http://www.dailystar.com/dailystar/dailystar/61117.php
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| | Gold Coin Flip Experiment |
| | Most folks accept that there are two outcomes to flipping a coin: heads or tails (we don't normally deal with the other two possibilities: landing on its edge, which is very hard to do, and flipping the coin so quickly it would gain orbit. | | | The following activity allows you to flip the coin fifty times (really fast too, but sigh, not quickly enough to gain orbit). | | | For instance, if we were to flip a coin twice, what would we expect to be the outcomes? |
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http://sln.fi.edu/fellows/fellow7/mar99/probability/gold_coin_flip.shtml
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| | Exchange |
| | - a protocol for fair coin flip in which no party can bias the | | | I will show some new results about quantum coin flipping: |
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http://www.cchem.berkeley.edu/~kbwgrp/QC-seminar/ambainis.html
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| | coin flipper |
| | Move the slider to adjust the speed of the flips. | | | Watch (but don't touch) the other sliders which count the number of heads, tails, and total flips. | | | Click on the "flipper" button to flip the coin 100 times. |
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http://www.mathcats.com/microworlds/coinflipper.html
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| | IntelliMathics 3: Using Flipping Coin |
| | Selecting Flipping Coin from the IntelliMathics menu inserts a Flipping Coin on the page in its unlocked mode. | | | TIP: You can assign a button the actions Reset All Event Results, Reset Event Results, Update All Events, and Update Event. | | | How do I select reporting options for Flipping Coin? |
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http://www.intellitools.com/Products/Classroom_suite/support/suiteHelp/357.htm
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| | Citebase - Quantum weak coin-flipping with bias of 0.192 |
| | Each classical public-coin protocol for coin flipping is naturally associated with a quantum protocol for weak coin flipping. | | | Coin tossing is a cryptographic task in which two parties who do not trust each other aim to generate a common random bit. | | | We present a quantum protocol for the task of weak coin flipping. |
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http://citebase.eprints.org/cgi-bin/citations?id=oai:arXiv.org:quant-ph/0403193
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| | Coin Flipping |
| | The figure keeps track of the number of flips, and the number of heads that appear. | | | On the left is a simulation of a fair coin. | | | The answer to this coin flipping problem can be found at this link. |
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http://espse.ed.psu.edu/statistics/Chapters/Chapter7/coinflip.html
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| | flipacoin.net - Flip a coin, any coin! |
| | We currently have 78 coins from 27 countries to choose from. | | | If you need to pick where to go out to eat, you can flip a coin. | | | Flipping a coin is, in my opinion, the best way to decide between two options. |
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http://www.flipacoin.net
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| | NPR : The Not So Random Coin Toss |
| | But using high speed cameras and equations, Diaconis and colleagues have now found that even though humans are largely unpredictable coin flippers, there's still a bias built in: If a coin starts out heads, it ends up heads when caught more often than it does tails. | | | Each human-generated flip has a different height and speed, and is caught at a different angle, giving different outcomes. | | | He had Harvard University engineers build him a mechanical coin flipper. |
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http://www.npr.org/templates/story/story.php?storyId=1697475
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| | Secure Coin Flipping (Aaron Swartz: The Weblog) |
| | While preparing it I realized there was one cool cryptographical protocol I hadn’t executed yet: secure coin flips. | | | (To be particularly safe, Bob should probably try to flip a coin of his own.) He tells Alice his guess. | | | He doesn’t know the number, only the hash (which is designed to be practically impossible to reverse) so he’s making a shot in the dark. |
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http://www.aaronsw.com/weblog/000218
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| | Quantum Weak Coin-Flipping with Bias of 0.192 |
| | We present a family of protocols for flipping a coin over a telephone in a quantum mechanical setting. |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/focs/2004/2228/00/2228toc.xml&DOI=10.1109/FOCS.2004.55
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| | Investor Home - Coin-Flipping & Graham-and-Doddsville |
| | After 20 flips, based purely on chance, there would be approximately 250 people that had called 20 consecutive coin flips - a seemingly miraculous feat. | | | Press coverage and inquiries about their coin calling ability would increase with each successive flip. | | | The surviving callers would have over one million dollars each at that point. |
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http://www.investorhome.com/coinflip.htm
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| | Math Forum - Ask Dr. Math |
| | Each flip of the coin can result in 2 distinct and equally likely outcomes, H or T. Moreover, the result of any coin flip is not influenced by or dependent upon any previous coin flip. | | | The chance of getting T(first flip), then T(second flip), then T(third flip), H on the fourth flip and H on the fifth flip is: (1/2)*(1/2)*(1/2)*(1/2)*(1/2) = 1/32. | | | Example: You roll a single die, then flip a coin. |
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http://mathforum.org/library/drmath/view/56587.html
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| | Counting Coin Flips - Mark Jacobson |
| | Press down your mouse button down inside the circle to flip the coin, getting Heads or Tails. | | | Perhaps the coin rolled off the table, so we need to toss it again. | | | Coin flipping:.contains() method and keeping a counter - 09/16-18/2002 |
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http://www.cns.uni.edu/~jacobson/061/applets/CoinFlipSimulator.html
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| | Caltech Computer Science Technical Reports - On bit-commitment based quantum coin flipping |
| | In this paper, we focus on a special framework for quantum coin flipping protocols, {\em bit-commitment based protocols}, within which almost all known protocols fit. | | | Nayak, Ashwin and Shor, Peter (2002) On bit-commitment based quantum coin flipping. | | | We show a lower bound of~$1/16$ for the bias in any such protocol. |
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http://caltechcstr.library.caltech.edu/327
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| | Coin Flip for Ben Franklin's 300th Birthday |
| | In preparation for the event, students can begin practicing their coin flipping techniques. | | | On Tuesday, January 17, 2006, students will each flip a coin ten times and then enter their data at The Franklin Institute Online and see their data merge with the aggregated results from coin flips in classrooms and homes around the world. | | | The smallest valued coin of a country's currency should be used for flipping, illustrating the greater value gained from the combined strength of common scientific enterprise. |
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http://fi.edu/flip
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| | Court won't decide case of jury who voted by flipping a coin |
| | Court won't decide case of jury who voted by flipping a coin | | | When the coin flip came to light, based on the juror's own accounting of it, Reyes unsuccessfully sought a new trial. | | | Isidro Samuel Reyes was convicted in California on a cocaine charge after a jury in the Los Angeles area deliberated for two days in November 1995. |
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http://www.sfgate.com/cgi-bin/article.cgi?file=/news/archive/2000/10/30/state1236EST0159.DTL
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| | Newsgroops - Re: Coin-Flipping Machine |
| | flip it, then it has a slight tendency to be tails when you catch | | | I think what it says is that the coin has a slight tendency | | | > But the article says that the coin _is_ biased (a slight tendency |
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http://www.newsgroops.org/group/sci.math/article-281482.html
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| | The Korea Times : Stock Investment Is No Coin Flipping Game |
| | The Korea Times : Stock Investment Is No Coin Flipping Game | | | Do you think winning a coin toss several times in a row necessarily means you’ll win the next several times? | | | Let’s suppose you won $100 playing a coin flipping game. |
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http://times.hankooki.com/lpage/biz/200508/kt2005082321194311860.htm
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| | COIN FLIPPING: A BINOMIAL EXPERIENCE |
| | As you can note, at this point in the experiment, the "4" column contains the most coins, with the "3" and "5" column a bit behind. | | | They are flipping 8 pennies, and counting the number of heads that appear. | | | Here are Cade, -------, Tyler, and Derek doing some coin flipping. |
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http://www.herkimershideaway.org/writings/coin8fl.htm
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| | Flipping a Coin |
| | The green line shows the theoretical probability for each event. | | | Select the number of coins you wish to toss from the pull down menu. |
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http://argyll.epsb.ca/jreed/math9/strand4/coin2.htm
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| | Vince & Steph: Coin Flipping |
| | Today in Science News Online they have an article that there is a 1% percent advantage in calling a coin flip if you call the side that the coin started out on. | | | This combined with the data on spinning a coin on its side and you can be assured not to be hustled by any street sharpies. | | | Just yesterday I flipped a coin to decide if I should purchase Smallville Season 2 on DVD or What's Happening Now Season 1. |
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http://www.vinceandsteph.com/mtarchives/000003.html
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| | SA Coin Corporation |
| | SA Coin is the largest company in the world dealing with South African rare coins and we will equal and reduce by 10% any prive more competitive than our own, subject to stock access on non-bullion south african rare coins. | | | We provide news and information from the world leader in south african rare coins. | | | SA Coin corporation specialises in rare coins comming from South Africa. |
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http://www.sacoin.co.za
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| | Ken White's Coin Flipping Page |
| | If you want to demonstrate a coin flip or flips in class, and don't have one handy, you can do it here. | | | You can also find records of past flips by others. | | | With Netscape, you can even watch them flip, rather than just seeing the results. |
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http://www.wu-wien.ac.at/mirrors/wueconb.wustl.edu/EconFAQ/node454.html
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| | Its like a coin flipping |
| | Re:Its like a coin flipping lostinlife: Anytime :D. How is the visit going so far? | | | Its like a coin flipping richmds: I know everyone has heard it a thousand times, but yesterday I was kind of down, read some stuff on this board and I was feeling better or great. | | | Re:Its like a coin flipping richmds: Thanks LiL. |
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http://www.ojar.com/view_5580.htm
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| | Coin Toss Simulation |
| | The results of the coin tosses will appear in a pop-up window. | | | If you have pop-ups disabled, you might have to check to see if another window opened in the background. |
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http://www2.whidbey.net/ohmsmath/webwork/javascript/cointoss.htm
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| | TheStreet.com: Sure, II's Sentiment Indicator Works. So Does Flipping a Coin. |
| | In other words, the II remains about as valuable as, say, flipping a coin. | | | The coin flip is a useful analogy because it brings up the idea of the gambler's fallacy -- the belief that if I've just thrown heads, my next throw will be tails. | | | Or that if I carry a gun onto an airplane, that will lower the chances that someone else on the plane will be packing. |
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http://www.thestreet.com/markets/marketfeatures/721314.html
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| | About "Coin Flipping" |
| | Includes access to data on past coin flipping and an article about coin flipping. | | | A page that allows you to gather data on virtual coin-flipping experiments. |
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http://mathforum.org/library/view/4366.html
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