Probability Theory, Expectations, Variance, Mathematics.
values of x multiplied by their density function. Examples of Calculating Expectation Take rolling a die as an example. The probability of each face appearing is 1/6. Therefore, the expectation of rolling a die is 1 * 1/6 + 2 * 1/6 + 3 * 1/6 + 4 * 1/6 + 5 * 1/6 + 6 * 1/6, which equals 3.5. This