A discrete random variable is illustrated typically with dots or dashes, while a continuous variable is illustrated with a solid line.

Discrete random variable A random variable that can take only a certain specified set of individual possible values-for example, the positive integers 1, 2, 3, . . .

A discrete distribution is a statistical probability distribution that represents the possible discrete values a variable can take.

Apply arithmetic mean of frequency distribution to find the expected value of a random variable The expected value of discrete random variable as summation of product of discrete random variable ...