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:
“Why should not our whole life and its scenery be actually thus fair and distinct? All our lives want a suitable background. They should at least, like the life of the anchorite, be as impressive to behold as objects in a desert, a broken shaft or crumbling mound against a limitless horizon.”
—Henry David Thoreau (1817–1862)
“Washington society has always demanded less and given more than any society in this country—demanded less of applause, deference, etiquette, and has accepted as current coin quick wit, appreciative tact, and a talent for talking.”
—M. E. W. Sherwood (1826–1903)