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Medical research suggests that systolic blood pressure in adults is approximately normally distributed with a mean of 123.5 mm Hg and standard deviation 11.5 mm Hg.
What value of systolic blood pressure distinguishes the highest 10%?
Medical research suggests that systolic blood pressure in adults is approximately normally distributed with a mean of 123.5 mm Hg and standard deviation 11.5 mm Hg.
What value of systolic blood pressure distinguishes the highest 10%?
18 Jul 2023
Irving HeathcoteLv2
5 Apr 2019
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| A sample of 105 hypertensive people were given an anti-hypertensive drug, and the drug was found to be effective in 76 of those people. (By effective, we mean that their diastolic blood pressure is lowered by at least 10 mm Hg as judged from a repeat measurement taken 1 month after taking the drug.) |
| (a) | Find a 91% confidence interval for the true proportion of the sampled population for which the drug is effective |
