A television news report says that "74% of Americans have a Facebook account." The poll is based on phone survey interviews with 4,650 adults randomly chosen from a numbered list of five million responses from around the United States, excluding Florida and Washington.

Part A: What is the population and sample in this poll? (3 points)

Part B: What type of sampling is used? (3 points)

Part C: Are there any sources of bias present? Explain. (4 points) (10 points)