Refer to the sentence in warning 7 on p. 528 that states: “If all of the null hypotheses tested are true, then over the long run about 1 in 20 tests should achieve statistical significance just by chance.” Is that statement the same thing as saying that the null hypothesis is likely to be true in about 1 out of 20 tests that have achieved statistical significance? Explain.
Answer to relevant QuestionsOne of the quotes in News Story 1 refers to the results of measuring antibodies to the influenza vaccine. It says: While everyone who participated in the study had an increased number of antibodies, the mediators had a ...Read News Story 19, “Young romance may lead to depression, study says” and use it to answer these questions. a. How many participants were there in this study? b. The story actually reports the magnitude of the ...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 ...Pick three of the possible problems with meta-analysis listed in Section 25.4, and discuss how they might apply to the reviews in the Cochrane Database. Refer to Example 26.2 about Janet’s dissertation research. Explain whether each of the following changes would have been a good idea or a bad idea: a. Have someone who is blind to conditions and has not heard the ...
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