In probability theory and statistics, a sequence of independent Bernoulli trials with probability 1/2 of success on each trial is metaphorically called a fair coin. One for which the probability is not 1/2 is called a biased or unfair coin. In theoretical studies, the assumption that a coin is fair is often made by referring to an ideal coin.
Some coins have been alleged to be unfair when spun on a table, but the results have not been substantiated or are not significant. There are statistical procedures for checking whether a coin is fair.
Read more about Fair Coin: Role in Statistical Teaching and Theory, Fair Results From A Biased Coin
Famous quotes containing the words fair and/or coin:
“Personal size and mental sorrow have certainly no necessary proportions. A large bulky figure has a good a right to be in deep affliction, as the most graceful set of limbs in the world. But, fair or not fair, there are unbecoming conjunctions, which reason will pa tronize in vain,—which taste cannot tolerate,—which ridicule will seize.”
—Jane Austen (1775–1817)
“It is not funny that a man should be killed, but it is sometimes funny that he should be killed for so little, and that his death should be the coin of what we call civilization.”
—Raymond Chandler (1888–1959)