Explain why it is important to learn what sample size was used in a study for which “no difference” was found.
Answer to relevant QuestionsThe news story quoted in Exercise 9 also stated that “frequent exercisers had slight or no increased risk.” (In other words, frequent exercisers had slight or no increased risk of heart attack when they took on a ...Refer to the list of warnings on pages 527– 528. Explain which ones should be of concern if the sample size(s) for a test are large. From this discussion, you should realize that you can’t simply rely on news reports to ...Refer to the previous exercise. a. Do you think the alternative hypothesis used by the researchers was one-sided or two-sided? Explain. b. Do you think the researchers would be justified in specifying a one-sided alternative ...New Scientist (Mestel, 12 November 1994) reported a study in which psychiatrist Donald Black used the drug fluvoxamine to treat compulsive shoppers: In Black’s study, patients take the drug for eight weeks, and the effect ...A meta-analysis of 32 studies on the effectiveness of “self-talk” on sports performance was summarized as follows: The analysis revealed a positive moderate effect size (ES = .48). The moderator analyses showed that ...
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