A psychologist investigating treatments for headaches believes that training in relaxation will reduce the number of reported headaches. A group of nine subjects are taught to induce the relaxation response as a method of managing their headaches. The number of headaches for a 1- week period before treatment is recorded as a baseline. After training the number of headaches for another 1-week period is recorded by these same subjects. Baseline After Training 17 3 13 7 6 2 5 3 5 6 10 2 8 1 6 0 7 2 Analyze this data. Use a two-tailed test at an alpha of .05. Include information about the 95% confidence interval. 2A psychologist is interested in determining whether immediate memory capacity is affected by sleep loss. Immediate memory is defined as the amount of material that can be remembered shortly after it has been presented. Twelve students are randomly selected from Introductory Psychology and randomly assigned to two groups of six each. One of the groups is sleep deprived for 24 hours before the material is presented. All subjects in the other group receive the normal amount of sleep (7-8 hours). The material consists of a series of slides, with each slide containing nine numbers. Each slide is presented for a short time interval (50 milliseconds), after which the subject must recall as many numbers as possible. The following are the results. The scores represent the percentage correctly recalled. Normal Sleep Group 1 68 73 72 65 70 73 223 22 Sleep-Deprived Group 2 70 62 68 63 69 60 Analyze this data. Use a two-tailed test at an alpha of .05. Include information about the 95% confidence interval.