Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the comparison treatments. Each participant takes the assigned medication and his or her systolic blood pressure is recorded after 6 months on the assigned treatment. The data are as follows. Standard Treatment Placebo New Treatment 124 140 114 117 143 113 133 148 121 128 146 120 131 150 122 115 160 128 Is there a difference in mean systolic blood pressure among treatments? Run the appropriate test at α = 0.05.

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