# Expected value formula statistics

The formula for the expected value is relatively easy to compute and involves several multiplications and additions. Definition of expected value & calculating by hand and in Excel. Includes video. Find an expected value for a discrete random variable. This article is about the term used in probability theory and statistics. For other uses, see Expected value (disambiguation). In probability theory, the expected value of a random variable, intuitively, is the long-run {\displaystyle f_{X}(x)={\ frac {1. We can use this inversion formula in expected value of a function g(X) to obtain.

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Discrete Probability Distributions: Finding Probabilities, Expected Value, and Standard Deviation More practically, the expected value of a discrete random variable is the probability-weighted average of all possible values. Expected value formula for continuous random variables. Identify all possible outcomes. In this book he considered the problem of points and presented a solution based on the same principle as the solutions of Pascal and Fermat. Community Dashboard Random Article About Us Categories Recent Changes.