Anticipated value for a given investment. In statistics and probability analysis, expected value is calculated by multiplying each of the possible outcomes by the. How to Calculate an Expected Value. Expected value (EV) is a concept employed in statistics to help decide how beneficial or harmful an action might be. In probability theory, the expected value of a random variable, intuitively, is the long-run .. This is because an expected value calculation must not depend on the order in which the possible outcomes are presented, whereas in a conditionally. Let X represent the outcome of a roll of a fair six-sided die. The expected value EV of a set of outcomes is the sum of the individual products of the value times its probability. We present two techniques:. Search the site GO. In this example, we see that, in the long run, we will average a total of 1. What is the expected value for this group of numbers. Broker Reviews Find the best broker for your trading or investing needs See Reviews. The probability of the outcomes usually depends on many external factors. Theme Horse Powered by: Given a discrete random variable X , suppose that it has values x 1 , x 2 , x 3 ,. Probability - 1 Variable Lesson 4: Help answer questions Start your very own article today. Get Free Newsletters Newsletters. Also recall that the standard deviation is equal to the square root of the variance. This is utilized in covariance matrices. Each possible outcome represents a portion of the total expected value for the problem or experiment that you are calculating.