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...

Extracted text: 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 1 143 130 2 158 140 174 188 4 166 166 5 166 131 157 118 7 132 95 8 136 124 9 129 121 10 159 134 Give a 97% confidence interval for uB - µAl, the difference between LDL levels before and after taking the medication. Confidence Interval =