Using the data in Appendix D, compare grade point averages for those having ADDSC scores of 65 or less with those having ADDSC scores of 66 or more.
Answer to relevant QuestionsCalculate Cohen’s d^ for the data in Exercise 14.15. Demonstrate that, because we have equal sample sizes, I would have arrived at the same answer in Section 14.10 if I had not pooled the variances, although the degrees of freedom would probably differ. Using the Java program by Lenth (2011) referred to earlier, calculate power for the Adams et al. (1996) data in Table 14.2 on homophobia. Generate a table analogous to Table 15.2 for power equal to 0.80, with a = .01, two-tailed. Following on from Exercise 15.3, suppose that my colleagues were tired of having children tell them what they think we want to hear and gave them a heart-to-heart talk on the necessity of accurate reporting. Suppose that ...
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