(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 (Aller), Subject Before After 117 119 1 2 3 4 5 6 7 8 9 10 123 135 186 110 119 191 153 136 117 153 16-4 109 109 200 130 127 104 158 Give a 95% confidence interval for B - A the difference between LDL levels before and after taking the medication Contidence interval