The U.S. Department of Health and Human Services wants to know whether the healthcare system is achieving its goals in Massachusetts. Much information about healthcare comes from patient records, but that source doesn't allow us to compare people who use health services with those who don't. Therefore, the U.S. Department of Health and Human Services conducted the Massachusetts Health Survey, which was used to interview a random sample of 34,572 people who live in Massachusetts.

Part A: What is the population for this sample survey? What is the sample? (3 points)

Part B: Describe a method that could have been used to obtain the random sample. (3 points)

Part C: The survey found that 70% of individuals over age 25 and 87% of individuals ages 25 and younger in the sample had visited a general practitioner at least once during the past year. Do you think these estimates are close to the truth about the entire population? Explain. (4 points)