A clinical trial is planned to compare the experimental medication designed to lower blood pressure to the placebo. Before starting the trial, a pilot study is conducted involving 7 participants. The objective of study is to evaluate how systolic blood pressure changes over time untreated. Systolic blood pressures are calculated at baseline as well as again in 4 weeks later. Is there a statistically important difference in blood pressures over time? Run the test at a 5% level of significant.
Baseline: 120 145 130 160 152 143 126
4 weeks: 122 142 135 158 155 140 130
a) Set up hypotheses and find out level of significance.
b) Choose the appropriate test statistic.
c) Set up decision rule.
d) Calculate the test statistic.
e) Conclusion. Accept H0 reject H0