2. A clinical trial is planned to compare an experimental   medication designed to lower blood pressure to a placebo. Before starting the   trial, a pilot study is conducted involving 10 participants. The objective of   the study is to assess how systolic blood pressure changes over time   untreated. Systolic blood pressures are measured at baseline and again 4   weeks later. Compute a 95% confidence interval for the difference in blood   pressures over 4 weeks.         Baseline 4 Weeks     120 122     145 142     130 135     160 158     152 155     143 140     126 130     121 120     115 124     135 130      

 

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