### MATH 318, Chapter 2 Quiz

Name:
You may use a calculator on this quiz. You may not use a cell phone or computer. If you wish partial credit for incorrect answers, please show your work carefully and give justifications for your answers. If you find that you are spending a lot of time on one problem, leave it blank and move on to the next. There are questions on both sides of this quiz paper.
1. (15 points) "The probability of getting a 7 when you roll two dice is 1/6." Was this probability determined by the classical method, relative frequency method, or subjective method? Write a sentence explaining your answer.

2. (25 points) Give an example of two independent events. Write a sentence explaining why the events are independent.

3. (15 points) Write the formula for the Addition Law.

4. Shown below is part of a joint probability table describing the performance of two telemarketers.
 Made a sale Didn't sell Sean 5% 40% Pat 8% 47%
b) (20 points) Who made more calls, Sean or Pat? How do you know?

c) (25 points) Are the events "A sale was made" and "Sean placed the call" independent or dependent? Explain your answer.