Basic Concepts When dealing with these numerical values,it is useful to assign probabilities to them. This is done through the notion of a random variable. Random Variable X Sample Space 2 X Real Number LineBasic Concepts ◼ When dealing with these numerical values, it is useful to assign probabilities to them. ◼ This is done through the notion of a random variable. Sample Space Ω Random Variable 𝑋 𝑥 Real Number Line