Instructions: You must show all your work. You will not receive full credit for a correct answer if there is no work shown. Problem 1. # 6.7.4. A study was conducted to determine whether relaxation training, aided by biofeedback and meditation could help in reducing high blood pressure. Subjects were randomly allocated to a biofeedback group or a control group. The biofeedback group received training for eight weeks. The table below reports the reduction in systolic blood pressure (mm Hg) after eight weeks. (a) Construct a 95% confidence interval for the difference in mean response. (b) Interpret the confidence interval from part (a) in the context of this setting. Biofeedback Control n 99 93 y 13.8 4.0 S 13.33 12.54