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Additional Time Used: 11 hours, 25 minutes, 19 seconds. Question Completion Status: QUESTION 1 Questions 1 through 4 refer to the following research scenario and data: You are interested in determining whether biofeedback has an impact on headaches. You design an experiment in which & participants with tension headaches keep daily logs of the number of headaches they experience during a 2-week baseline period. Then, you train them to use a biofeedback technique. After 6 weeks of training, during which the participants have become successful using the biofeedback technique, they again keep a 2-week log of the number of headaches experiences. The following are the numbers of headaches recorded during each 2-week period: Subject Baseline(pre) After Training(post) 10 5 8 6 DO WOD U A WIN- 8 10 Using SPSS where appropriate, test if biofeedback had a significant effect on the number of headaches experienced. Test at an a = .05 2-tail, 1. Identify the null (Ho) and alternative (Hq) hypotheses. Ho Biofeedback does not have an impact on headaches O Ho: Biofeedback does have an impact on headaches O H1: Biofeedback does not have an impact on headaches Hy: Biofeedback does have an impact on headaches QUESTION 2 Identify the tobe value for this test (report three decimal places) QUESTION 3QUESTION 2 Identify the tobe value for this test (report three decimal places). QUESTION 3 Identify the df. QUESTION 4 What decision should you make regarding the null hypothesis and what conclusion should you make about the effects of biofeedback on headaches? Decision: Reject the null Decision: Retain the null O Conclusion: Biofeedback affects headaches O Conclusion: Biofeedback does not affect headaches QUESTION 5 Use the following research scenario and data to answer questions 5 through 8: On the basis of her experience with clients, a clinical psychologist thinks that depression may affect sleep. She decides to test this idea. The sleep of eight depressed patients and eight normal controls is monitored for three successive nights. The average number of hours slept by each subject during the last two nights is displayed below. You can assume equal variances. Hours of sleep Depressed Patients Normal Controls 7.1 8.2 68 75 Click Save and Submit to save and submit. Click Save All Answers to save all answers. arch O e