In this post, learn how to find an expected value for different cases and calculate it using formulas for various probability distributions. We’ll work through example calculations for expected …

In probability theory, the expected value (also called expectation, expectancy, expectation operator, mathematical expectation, mean, expectation value, or first moment) is a …

Jan 2, 2025 · As we noted, the expected value of an experiment is the mean of the values we would observe if we repeated the experiment a large number of times. (This interpretation is …

Definition (informal) The expected value of a random variable is the weighted average of the values that can take on, where each possible value is weighted by its respective probability.

You can think of an expected value as a mean, or average, for a probability distribution. A discrete random variable is a random variable that can only take on a certain number of values.

In probability theory, an expected value is the theoretical mean value of a numerical experiment over many repetitions of the experiment. Expected value is a measure of central tendency; a …

Oct 3, 2025 · Expected value, in general, the value that is most likely the result of the next repeated trial of a statistical experiment. The probability of all possible outcomes is factored …

Jul 23, 2025 · The expected value (often denoted as E (X) or μ) of a random variable X is a measure of the central tendency of its probability distribution. It is essentially the mean value …

To find the expected value, E (X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as E …

Calculate probabilities and expected value of random variables, and look at ways to ransform and combine random variables.