Calculate the sample mean and standard deviation

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Reference no: EM132286340

1. A woman in a nursing home is on medication for high blood pressure. Her blood pressure is taken daily. A sample of 20 blood pressure readings (mmHg) appears below.

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a. Calculate the sample mean and standard deviation.

b. Determine a 95% confidence interval for µ, her mean systolic blood pressure. Show your calculations. How is this different than when we know the population standard deviation, sigma? 

c. Is the underlying assumption that these data come from a normal distribution reasonably satisfied? Explain.

Reference no: EM132286340

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