Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the comparison treatments. Each participant takes the assigned mediaction 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
124 134 114
111 143 117
133 148 121
125 142 124
128 150 122
115 160 128
Is there a difference in
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