Expected value definitions

Expected value

In probability theory, the expected value of a random variable is intuitively the long-run average value of repetitions of the experiment it represents. For example, the expected value of a die roll is 3.5 because, roughly speaking, the average of an extremely large number of die rolls is practically always nearly equal to 3.5. Less roughly, the l...
Found on http://en.wikipedia.org/wiki/Expected_value

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Expected value

The weighted average of possible outcomes, with the weights being the probabilities of occurrence.
Found on http://wps.pearsoned.co.uk/wps/media/objects/1669/1709588/glossary/glossary

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Expected value

1. The mathematical expected value of a random variable. Equals the sum (or integral) of the values that are possible for it, each multiplied by its probability. 2. What people think a variable is going to be. In general, the expectation in this second sense may be more important than the first for determining behavior on a market, such as the exc...
Found on http://www-personal.umich.edu/~alandear/glossary/

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expected value

(from the article `probability theory`) Given a random variable with distribution , the expected value of , denoted (), is defined by () = (). In words, the expected value of is the sum ...
Found on http://www.britannica.com/eb/a-z/e/59

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Expected value

For a random variable, the weighted average of its possible values, with weights given by their respective probabilities.
Found on http://www.corestandards.org/Math/Content/mathematics-glossary/glossary/

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Expected value

The weighted average of a probability distribution. Also known as the mean value.
Found on http://www.duke.edu/~charvey/Classes/wpg/bfglose.htm

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expected value

The expected value of a random variable is the mean of its distribution. In its technical use this word does not have exactly the same meaning as in ordinary English. For example, people buying a lottery ticket that has a 1/10,000 chance of paying $10,000 can expect to get zero since that is overwhelmingly the likely outcome. They can be certain th...
Found on http://www.econterms.com/glossary.cgi?query=expected+value

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Expected value

The weighted average of a probability distribution.
Found on http://www.encyclo.co.uk/local/20047

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Expected Value

Implication of the CAPM that security risk premiums will be proportional to beta.
Found on http://www.encyclo.co.uk/local/22402

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Expected value

Let x be a discrete variable with probability distribution p(x) and let E(x) represent the expected value of x. Then E(x) = xp(x)/x
Found on http://www.encyclo.co.uk/visitor-contributions.php

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Expected Value

Is viewed as an anticipated, theoretical or fair value for an instrument.
Found on http://www.oasismanagement.com/glossary/

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Expected Value

Expected value (EV), also known as mean value, is the expected outcome of a given investment, calculated as the weighted average of all possible values of a random variable based on their probabilities.
Found on https://www.myaccountingcourse.com/accounting-dictionary/accounting-diction

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Expected value

The process of adding the value of a win times the probability of a win to the value of a loss times the probability of a loss in order to make a decision.
Found on https://www.sparknotes.com/psychology/psych101/glossary/terms/

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expected value

the amount predicted to be gained, using the calculation for average expected payoff, which can be calculated as the integral of a random variable with respect to its probability measure (the expected value may not actually be the most probable value and may not even exist, e.g. 2.5 children)
Found on https://www.storyofmathematics.com/glossary.html

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