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QUESTION 17 If a sample average is found to be 62.7, and the margin of error...

QUESTION 17 If a sample average is found to be 62.7, and the margin of error is calculated to be 4.6, then the upper end of the confidence interval for mu would be ______

QUESTION 18 If a sample average is found to be 18, and the margin of error is calculated to be 0.06, then the lower end of the confidence interval for mu would be ______

QUESTION 19 Use your TI83 to find the upper end of the interval requested: A 95% confidence interval for the average height of the adult American male if a sample of 25 such males have an average height of 56.9 inches with a sample deviation of 3.4 inches. The population of all such heights is normally distributed round to the nearest hundredth of an inch

QUESTION 20 Use your TI83 to find the upper end of the interval requested: A 99% confidence interval for the average weight of a standard box of Frosted Flakes if sample of 66 such boxes has an average weight of 16.8 ounces with a population deviation of 0.4 ounces round to the nearest hundredth of an ounce

Expert Solution

Solution:

QUESTION 17 If a sample average is found to be 62.7, and the margin of error is calculated to be 4.6, then the upper end of the confidence interval for mu would be 67.3

QUESTION 18 If a sample average is found to be 18, and the margin of error is calculated to be 0.06, then the lower end of the confidence interval for mu would be 17.94

QUESTION 19 Use your TI83 to find the upper end of the interval requested: A 95% confidence interval for the average height of the adult American male if a sample of 25 such males have an average height of 56.9 inches with a sample deviation of 3.4 inches. The population of all such heights is normally distributed round to the nearest hundredth of an inch

Answer: 58.30

The steps in TI83 are:

Press STAT and then scroll right to TESTS

Scroll down to TInterval and then scroll to Stats

Enter the values as:

The output is:

QUESTION 20 Use your TI83 to find the upper end of the interval requested: A 99% confidence interval for the average weight of a standard box of Frosted Flakes if sample of 66 such boxes has an average weight of 16.8 ounces with a population deviation of 0.4 ounces round to the nearest hundredth of an ounce

Answer: 16.93

The steps in TI83 are:

Press STAT and then scroll right to TESTS

Scroll down to ZInterval and then scroll to Stats

Enter the values as:

The output is:

milcah answered 1 year ago

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