Question: A recent pilot study tested whether walking daily improved systolic blood pressure. For the three subjects in thestudy, their resting systolic blood pressure was measured

A recent pilot study tested whether walking daily improved systolic blood pressure. For the three subjects in thestudy, their resting systolic blood pressure was measured at the beginning of the study and again after participating in a walking program for 3 weeks. The table shows the results.

Find a95% confidence interval for the differences between the population means of subjects before and after going through such a study.

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