In Example 26.2, Janet’s decision to make Group 2 the control group after the first volunteer came to her office.
Answer to relevant QuestionsExplain 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. “People who often attend cultural activities, such as movies, sports events and concerts, are more likely than their less cultured cousins to survive the next eight to nine years, even when education and income are taken ...A study reported in the May 17, 2012, issue of The New England Journal of Medicine followed people for an average of 13 years and found that people who consumed two or more cups of coffee a day were less likely to die during ...In Hypothetical News Article 3 on page 27, what two pieces of data were collected on each dog? For each one, explain whether it was collected separately for each dog or for the dogs as a group. In Example 26.2, Janet’s handling of the fact that her data showed 26 volunteers in the control group when there should have been only 25.
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