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...

Extracted text: 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. Baseline 120 145 130 160 152 143 126 121 115 135 4 Weeks 122 142 135 158 155 140 130 120 124 130 The 95% confidence interval for the difference in blood pressures over 4 weeks is (-2.2, 4.0). What conclusion can be made in this situation? Reject the null hypothesis. O No conclusion can be made with the information provided. O There is a significant difference in mean blood pressure at baseline and after four weeks. OThere is no significant difference in mean blood pressure at baseline and after four weeks.