The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 24.7 for a sample of size 921 and standard deviation 18.7. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level)

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Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

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