6. A hypertension trial is mounted, and 12 participants are randomly assigned to receive either a new medication or a placebo. Each participant takes the assigned medication, and their systolic blood pressure (SBP) is recorded after 6 months on the assigned treatment. The data are as follows.

Is there a difference in mean SBP between treatments? Run the test at a 5% level of significance.

1. Write out the appropriate null hypothesis and the alternative hypothesis

2. Calculate the test statistic.

3. Give the conclusion including a comparison to alpha or the critical value.

Table 7-9 Data for Practice Problem 6

Placebo

New Medication

134

114

143

117

148

121

142

124

150

122

160

128