A researcher wanted to find the effect of a special diet on systolic blood pressure. She selected a sample of 6 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 completion of this plan. Before After 200 220 225 215 180 190 195 182 180 190 210 210 Let Hs be the mean reduction in the systolic blood pressure due to this special dietary plan for th population of all adults. Assume that the population of paired differences is (approximately) normal distrihuted

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Q3. A researcher wanted to find the effect of a special diet on systolic blood pressure. She selected a sample
of 6 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 completion of this plan.
215
190 200 220 225
180 190 210 210
Before
180
After
195
182
Let la be the mean reduction in the systolic blood pressure due to this special dietary plan for the
population of all adults. Assume that the population of paired differences is (approximately) normally
distributed.
(a) What is the point estimate of ua?
(b) Construct a 98% confidence interval for Hg and interpret the results.
(c) Mention the value of the margin of error.
Transcribed Image Text:Q3. A researcher wanted to find the effect of a special diet on systolic blood pressure. She selected a sample of 6 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 completion of this plan. 215 190 200 220 225 180 190 210 210 Before 180 After 195 182 Let la be the mean reduction in the systolic blood pressure due to this special dietary plan for the population of all adults. Assume that the population of paired differences is (approximately) normally distributed. (a) What is the point estimate of ua? (b) Construct a 98% confidence interval for Hg and interpret the results. (c) Mention the value of the margin of error.
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