A researcher wanted to find the effect of a special diet on systolic blood pressure. She selected a sample of seven adults and put them on this dietary plan for 3 months. The following table gives the systolic blood pressures (in mm Hg) of these seven adults before and after the com- pletion of this plan. Before After 210 193 180 186 195 186 220 223 231 220 199 183 224 233 Let u be the mean reduction in the systolic blood pressures due to this special dietary plan for the population of all adults. Construct a 95% confidence interval for u. Assume that the population of paired differences is (approximately) normally distributed.

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A researcher wanted to find the effect of a special diet on systolic blood pressure. She selected
a sample of seven adults and put them on this dietary plan for 3 months. The following table
gives the systolic blood pressures (in mm Hg) of these seven adults before and after the com-
pletion of this plan.
Before
After
210
193
180
186
195
186
220
223
231
220
199
183
224
233
Let u be the mean reduction in the systolic blood pressures due to this special dietary plan
for the population of all adults. Construct a 95% confidence interval for ud. Assume that the
population of paired differences is (approximately) normally distributed.
Transcribed Image Text:A researcher wanted to find the effect of a special diet on systolic blood pressure. She selected a sample of seven adults and put them on this dietary plan for 3 months. The following table gives the systolic blood pressures (in mm Hg) of these seven adults before and after the com- pletion of this plan. Before After 210 193 180 186 195 186 220 223 231 220 199 183 224 233 Let u be the mean reduction in the systolic blood pressures due to this special dietary plan for the population of all adults. Construct a 95% confidence interval for ud. Assume that the population of paired differences is (approximately) normally distributed.
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