Consider Example 8, for which the changes in the writing portion GRE scores for the first three people who attended a training workshop were 0.5, -0.5, and 1.5. Show how to use the sign test to test that the probability that the difference is positive equals 0.50 against the alternative hypothesis that it is greater than 0.50.
Answer to relevant QuestionsThe job placement center at your school surveys all graduating seniors at the school. Their report about the survey provides numerical summaries such as the average starting salary and the percentage of students earning more ...Exercise 10.47 in Chapter 10 discussed a pilot study of people who suffer from abnormally high blood pressure. A medical researcher decides to test her belief that walking briskly for at least half an hour a day has the ...Refer to the previous exercise. a. Would the results of your analysis change if for the second Bumper A the repair cost was $9000 instead of $2500? What does this illustrate about the analysis? b. Suppose the company ...Refer to the Georgia Student Survey data file on the text CD. Use a method from this chapter to test whether the amount of time spent browsing the Internet is independent of one’s political affiliation. State the (a) ...Nonparametric methods have also been devised for regression. Here’s a simple way to estimate the slope: For each pair of subjects, the slope of the line connecting their two points is the difference between their y values ...
Post your question