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).
1 188 187
2 114 125
3 167 141
4 141 109
5 151 145
6 182 152
7 193 166
8 173 154
9 135 145
10 120 134
Give a 95.5% confidence interval for μB−μA, the difference between LDL levels before and after taking the medication.
Confidence Interval =
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