In Original Source 1, the researchers addressed some limitations with the study. One of them was: First, there was a relatively small number of subjects who participated and this limited our statistical power. A number of our hypothesized effects were in the predicted direction, but failed to reach significance (Davidson et al., p. 569). Explain what is meant by the first sentence of the quote.
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. Refer to the quote in Exercise 25. Explain what is meant by the second sentence of the quote. In Example 13.2, we revisited data from Case Study 6.3, regarding testing to see if there was a relationship between gender and driving after drinking. We found that we could not rule out chance as an explanation for the ...Science News (25 January 1995) reported a study on the relationship between levels of radon gas in homes and lung cancer. It was a case-control study, with 538 women with lung cancer and 1183 without lung cancer. The article ...The handbook for the Cochrane Collaboration (http://handbook.cochrane.org, Section 2.3.2) includes the following quote: It is important to let people know when there is no reliable evidence, or no evidence about particular ...
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