The expected value of a discrete random variable is the sum of the product of the probability of each event by the value of that event.
The expected value of a random variable, X, is denoted by µ or E(X).
Variance of a Discrete Random Variable
Standard Deviation of a Discrete Random Variable
Calculate the expected value, variance, and standard deviation of the probability distribution for the possible outcomes that can be obtained by throwing a die.
|x||p i||x · p i||x 2 · pi|