30. Construct a 85% confidence interval around the sample mean of the decrease in diastolic pressure reading of those who took the drug. Show your n, PE, t, SE, ME and interval. Discuss the interpretation of the Confidence Interval.

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Q: how to calculate standard deviation

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Q: 8. mean = 23.8; standard deviation = 5,2

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Q: 10. mean = 54.2; standard deviation = 12,3

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