The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 23.6 mmHg (millimeters of mercury) for a sample of size 314 and a sample standard deviation 19.4 mmHg. How much of mmHg will lower for a typical patient's systolic blood pressure after taking the drug? Estimate with a 90% confidence. Preliminary: a. Is it safe to assume that n < 5% of all patients with a systolic blood pressure? O Yes No b. Is n ≥ 30? O No O Yes Confidence Interval:What is the 90% confidence interval to estimate the population mean? Round your answer to one decimal place.

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The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average,
the reduction in systolic blood pressure is 23.6 mmHg (millimeters of mercury) for a sample of size 314 and
a sample standard deviation 19.4 mmHg. How much of mmHg will lower for a typical patient's systolic
blood pressure after taking the drug? Estimate with a 90% confidence.
Preliminary:
a. Is it safe to assume that n < 5% of all patients with a systolic blood pressure?
O Yes
No
b. Is n ≥ 30?
No
Yes
Confidence Interval: What is the 90% confidence interval to estimate the population mean? Round your
answer to one decimal place.
<ft<
Transcribed Image Text:The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 23.6 mmHg (millimeters of mercury) for a sample of size 314 and a sample standard deviation 19.4 mmHg. How much of mmHg will lower for a typical patient's systolic blood pressure after taking the drug? Estimate with a 90% confidence. Preliminary: a. Is it safe to assume that n < 5% of all patients with a systolic blood pressure? O Yes No b. Is n ≥ 30? No Yes Confidence Interval: What is the 90% confidence interval to estimate the population mean? Round your answer to one decimal place. <ft<
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