# What is expected value

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Definition of expected value & calculating by hand and in Excel. Includes video. Find an expected value for a discrete random variable. Anticipated value for a given investment. In statistics and probability analysis, expected value is calculated by multiplying each of the possible outcomes by the. Expectation Value. The expectation value of a function f(x) in a variable x is denoted or E{f(x)}. For a single discrete variable, it is defined by.
Given a large number of repeated trials, the average of the results will be approximately equal to the expected value Expected value: An important property of the expected value, known as transformation theorem, allows to easily compute the expected value of a function of a random variable. Figure out your probability of getting each value of X. In the bottom row, put your odds of winning or losing. Symulator jacpota Index Interactive Entries Random Entry New in MathWorld. Because the probabilities that we are working with here are computed using the population, they are symbolized using lower case Greek letters. In general, with the exception of linear functionsthe expectation operator and functions of random variables do not commute ; spielautomaten selber aufstellen is.

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