Explain why the relationship shown in Table 1.1, concerning the use of aspirin and heart attack rates, can be used as evidence that aspirin actually prevents heart attacks.
Answer to relevant QuestionsSuppose researchers want to know whether smoking cigars increases the risk of esophageal cancer. a. Could they conduct a randomized experiment to test this? Explain. b. If they conducted an observational study and found that ...Suppose the administration at your school wants to know how students feel about a policy banning smoking on campus. Because they can’t ask all students, they must rely on a sample. a. Give an example of a sample they could ...Explain what problems may arise in trying to make conclusions based on a survey mailed to the subscribers of a specialty magazine. Find or construct an example. Suppose that a television network wants to know how daytime television viewers feel about a new soap opera the network is broadcasting. A staff member suggests that just after the show ends they give two phone numbers, one ...According to Cynthia Crossen (1994, p. 106): “It is a poller’s business to press for an opinion whether people have one or not. ‘ Don’t knows’ are worthless to pollers, whose product is opinion, not ignorance. ...
Post your question