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Informally, the expected value is the mean of the possible values a random variable can take, weighted by the probability of those outcomes. Since it is obtained through arithmetic, the expected value sometimes may not even be included in the sample data set; it is not the value you would expect to get in reality.
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Formally, it is the variance of the score, or the expected value of the observed information. The role of the Fisher information in the asymptotic theory of maximum-likelihood estimation was emphasized and explored by the statistician Sir Ronald Fisher (following some initial results by Francis Ysidro Edgeworth ).
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The term sound effect dates back to the early days of radio. In its Year Book 1931 the BBC published a major article about "The Use of Sound Effects". It considers sound effects deeply linked with broadcasting and states: "It would be a great mistake to think of them as analogous to punctuation marks and accents in print.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Expectation_value&oldid=1035645425"This page was last edited on 26 July 2021, at 21:51 (UTC). (UTC).
Expected value of sample information, the expected increase in utility that a decision-maker could obtain from gaining access to a sample of additional observations before making a decision Expected value of including uncertainty , the expected difference in the value of a decision based on a probabilistic analysis versus a decision based on an ...