Suppose a meta-analysis on the risks of drinking coffee included 100,000 participants of all ages across 80 studies. One of the conclusions was that a confidence interval for the relative risk of heart attack for women over 70 who drank coffee, compared with those who didn’t, was 0.90 to 1.30. The researchers concluded that coffee does not present a problem for women over 70 because a relative risk of 1.0 is included in the interval. Explain why their conclusion is not justified.
Answer to relevant QuestionsSuppose the officials in the city or town where you live would like to ask questions of a “representative sample” of the adult population. Explain some of the characteristics this sample should have. For example, would ...In its March 3–5, 1995 issue, USA Weekend magazine asked readers to return a survey with a variety of questions about sex and violence on television. Of the 65,142 readers who responded, 97% were “very or somewhat ...Eisenberg and colleagues (15 June 1993) used meta- analysis to examine the effect of “cognitive therapies” such as biofeedback, meditation, and relaxation methods on blood pressure. Their abstract states that ...When the Cochrane Collaboration (discussed on page 537) was first getting started, a report in New Scientist (Vine, 21 January 1995), announced that the UK Cochrane Centre in Oxford would be launching the Cochrane Database ...In Example 26.2, Janet’s decision to make Group 2 the control group after the first volunteer came to her office.
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