The mean diastolic blood pressure for a random sample of 70 people was 95 millimeters of mercury.
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Question

1.

The mean diastolic blood pressure for a random sample of 70 people was 95 millimeters of mercury. If the

standard deviation of individual blood pressure readings is known to be 11 millimeters of mercury, find a 99% confidence interval for the true mean diastolic blood pressure of all people. Then complete the table below.

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

What is the lower limit of the 99% confidence interval?

What is the upper limit of the 99% confidence interval?

2.

Suppose that a random sample of 17 adult U.S. males has a mean height of 71 inches with a standard deviation of 2 inches. If we assume that the heights of adult males in the U.S. are normally distributed, find a 95% confidence interval for the mean height of all U.S. males. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)

What is the lower limit of the confidence interval?

What is the upper limit of the confidence interval?

Top Answer

1) ( 9 1 . 5 , 9 8 . 5 ) Lowerlimit = 9... View the full answer

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