Some people are anxious about visiting the doctor. Researchers want to know if the mean blood pressure while waiting to see the doctor is higher than it is an hour after the visit. Eleven individuals have their systolic blood pressures measured while they are in the doctor's waiting room and again an hour after the conclusion of their appointment. The data are as follows (note that one person declined to take part in the post appointment measurement): Person Before: After: 1 132 118 2 135 137 3 149 4 133 139 5 119 105 6 121 116 7 130 122 8 132 124 9 119 10 110 103 11 115 109 115 a) Is this paired or unpaired data? b) Calculate the summary statistics relevant to this problem. c) Compute a 90% confidence interval for the mean change in systolic blood pressure. Show all your working and give a conclusion as to whether there is sufficient evidence to conclude that systolic blood pressure has fallen an hour after the visit. d) Conduct a parametric test to determine whether systolic blood pressure has fallen an hour after the visit. Do not use Excel. e) Conduct a nonparametric test to determine whether systolic blood pressure has fallen an hour after the visit. f) Which of these tests is most appropriate in this case? Give appropriate evidence