Mathematics, 06.11.2020 06:20 googoo4

The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 26.5 for a sample of size 565 and a standard deviation of 12.2. Round to two decimals a. What is the Standard Error?
b. Write a confidence interval state for a test at the 90% confidence level.

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