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Question: the drug is used to reduce blood pressure a group...

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1) The drug atenolol is used to reduce blood pressure. A group of 15 patients with high blood pressure report the following systolic pressures: 27.4 before medication: 197 130 161 153 170 178 191 207 143 138 140 205 140 157 203 167.5 27.1 after medication: 179 110 139 137 150 158 169 188 126 116 125 188 122 138 181 148.4 change: 18 20 22 16 20 20 22 19 17 22 15 17 18 19 22 19.1 2.3 a) Calculate a 95% CI or the change in blood pressure. b) Calculate a 99.9% Cl for the change in blood pressure. c Does either interval (the one you calculated in (a) or (b) include 0? Why is this important?

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