Is Blood Pressure the Same for Both Arms? Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman (based on data from “Consistency of Blood Pressure Differences Between the Left and Right Arms,” by Eguchi, et al., Archives of Internal Medicine, Vol. 167). Use a 0.01 significance level to test for a difference between the measurements from the two arms. What do you conclude?
Assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal.

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