Using the example in Exercise 8.2, describe what we mean by the rejection region and the critical value.
Answer to relevant QuestionsWhy might I want to adopt a one-tailed test in Exercise 8.2, and which tail should I choose? What would happen if I choose the wrong tail? In the study by Katz et al., referred to previously, in which subjects answered questions about passages they had not read, the question arises as to whether there is a relationship between how the students performed on this ...Assume that a set of data contains a curvilinear relationship between X and Y (the best-fitting line is slightly curved). Would it ever be appropriate to calculate r on these data? Use MYSTAT or another program to reproduce the results shown in Figure 9.11. Take the data that you just created in Exercise 10.12 and add 2.5 to each Y value. Plot the original data and the new data. On the same graph, superimpose the regression lines. (a) What has happened to the slope and ...
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