1. A company's employee database includes data on whether or not the employee includes a dependent child in his or her health insurance.
a) Is this variable discrete or continuous?
b) What are the possible values it can take on?
2. The database also, of course, includes each employee's compensation.
a) Is this variable discrete or continuous?
b) What are the possible values it can take on?
3. Suppose that the probabilities of a customer purchasing 0, 1, or 2 books at a book store are 0.2, 0.4, and 0.4, respec- tively. What is the expected number of books a customer will purchase?