Mean diastolic blood pressure

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Reference no: EM1393155

Confidence interval for the population mean: Use of the standard normal

Scenario: The mean diastolic blood pressure for a random sample of 90 people was 92 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 12 millimeters of mercury, find a 90% confidence interval for the true mean diastolic blood pressure of all people. Then complete the questions below:

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.

a) What is the lower limit of 90% confidence interval?

b) What is the upper limit of 90% confidence interval?

Reference no: EM1393155

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