To test the efficacy of a new cholesterol-lowering medication, 10 people are selected at random. Each has their LDL levels measured (s below as Before), then take the medicine for 10 weeks, and then has their LDL levels measured again (After). Subject 1 2 3 4 5 6 7 8 9 10 Before 140 144 153 125 161 182 151 127 After 131 136 114 113 166 171 147 139 166 135 182 131 Give a 93.3% confidence interval for HB-HA, the difference between LDL levels before and after taking the medication. Confidence Interval=