Random variables serve as theoretical models of uncertainty associated with the outcome of measurement. This unit deals with continuous random variables while the previous two units deal with discrete random variables.

• Do you think it is useful to have a theoretical model for a situation that occurs in real life? Justify.
• When forming your answer to this question give an example of a situation from you own field of interest for which a random variable, possibly from one of the types that are presented in this unit, can serve as a model.
• Discuss the importance (or lack thereof) of having a theoretical model for the situation.