The document discusses a telephone survey methodology utilizing random digit dialing that connects with live subjects 15% of the time. It poses questions regarding the independence of each call and calculates probabilities for specific outcomes in two attempts: achieving exactly two successful calls and a combination of one success and one failure. These questions highlight fundamental concepts in statistics related to probability and independent events.

1. 1. A telephone survey uses a random digit dialing machine to call subjects. The random digit
dialing machine is expected to reach a live person 15% of the time. a. True or False: Each call is
an independent random event. In two attempts, what is the probability of achieving b. exactly two
successful calls? (success = reach a live person) c. one success and one failure (in any order)?