# Expected value computation

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. 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. To keep things simple, we provide an informal definition of expected value and we discuss its computation in this lecture, while we relegate a more rigorous.
Compute the expected value of. You toss a coin until a tail comes up. If we use the probability mass function and summation notation, then we can more compactly write this formula as follows, where the summation is taken over the index i:. I am having a hard time understanding where the information goes. Calculating expected value and variance of a probability density function. The values for all six possible outcomes are as follows: