Dictionarymathemat'ical expecta'tion1. Math.the product of the probability of the occurrence of an event and the value associated with the occurrence of a given event. 2. Statistics.the summation or integration, over all values of a variate, of the product of the variate and its probability or its probability density. Also called expectation, expected value. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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