Using the data in Appendix D, use a t test to compare ADDSC scores of males and females.
Answer to relevant QuestionsUsing 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. Given the definition of a weighted average (see page 350), show what the pooled variance estimate (s2p) would be if the two sample sizes were equal. In Exercise 14.8 why might it be smart to look at the variances of the two groups? A beleaguered PhD candidate has the impression that he must find significant results if he wants to defend his dissertation successfully. He wants to show a difference in social awareness, as measured by his own scale, ...In Exercise 15.3 what sample sizes would be needed to raise power to 0.70, 0.80, and 0.90?
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