Coin tossing: Not as fair as you think, say researchers

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Coin tossing: Not as fair as you think, say researchers
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Get a daily digest of the latest news in tech, science, and technology, delivered right to your mailbox. Subscribe now.to decide trivial matters, such as who gets to bat first in a cricket match or who pays for the pizza. We assume the coin has an equal chance of landing on either heads or tails, making it a fair and random way to settle disputes.

We found overwhelming evidence for a "same-side" bias predicted by Diaconis and colleagues in 2007: If you start heads-up, the coin is more likely to land heads-up and vice versa. How large is the bias? In our sample, the mean estimate is 50.8%, CI .The researchers also calculated how much this bias could affect your winnings if you bet on the outcome of a coin toss. They found that knowing the starting position of thegive you an edge over your opponent.

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