SOLUTION: The mean diastolic blood pressure for a random sample of 60 people was 89 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 8 m
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Question 319821: The mean diastolic blood pressure for a random sample of 60 people was 89 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 8 millimeters of mercury, find a 90% confidence interval for the true mean diastolic blood pressure of all people. Then complete the table below:
What is the lower limit of the 90% confidence interval?
What is the upper limit of the 90% confidence interval? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The mean diastolic blood pressure for a random sample of 60 people was 89 millimeters of mercury.
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x-bar = 89
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If the standard deviation of individual blood pressure readings is known to be 8 millimeters of mercury, find a 90% confidence interval for the true mean diastolic blood pressure of all people.
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E = invT(0.95 with df = 59) = 1.6711*1.0328 = 1.7259
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90% CI: 89-1.7259 < u < 89+1.7259
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90% CI: 67.2741 < u < 90.7259
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Cheers,
Stan H.
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Then complete the table below:
What is the lower limit of the 90% confidence interval?
What is the upper limit of the 90% confidence interval?
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