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(1 point) To test the efficacy of a new cholesterol-lowering medication, 10 people are selected at random. Each has their LDL levels measured (shown below as Before), then take the medicine for 10 weeks, and then has their LDL levels measured again (After). Subject Before After 136 150 2 156 148 190 179 171 149 "JOUAU 180 170 134 132 198 174 8 193 185 177 182 10 166 174 Give a 97.3% confidence interval for MB - WA, the difference between LDL levels before and after taking the medication. Confidence Interval =