he effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 80.4 mmHg (millimeters of mercury) for a sample of size 826 and a sample standard deviation 12.4 mmHg. How much of mmHg will lower for a typical patient's systolic blood pressure after taking the drug? Estimate with a 99% confidence. Confidence Interval:What is the 99% confidence interval to estimate the population mean? Round your answer to one decimal place.  ----< μ <----

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