Find two journal articles, one that reports on a statistically significant result and one that reports on a nonsignificant result. Discuss the role of the sample size in the determination of statistical significance, or lack thereof, in each case. Discuss whether you think the researchers would have reached the same conclusion if they had used a smaller or larger sample size.
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 ...For each of the following, explain who is in the sample, and what population you think is represented. a. Case Study 1.1, testing the effect of a heart-beat sound in a baby nursery. b. Case Study 1.2, testing the effect of ...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 ...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 ...A standard protocol for the treatment of all participants that must be strictly followed. Exercises 12 to 21: Explain the main ethical issue of concern in each of the following. Discuss what, if anything should have been ...
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