You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters...

You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters has a mean weight of 5.643 grams and a standard deviation of 0.065 grams. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. Q- The mean weight of all quarters is approximately ? grams Q- The lower limit of the 95% confidence interval is ? Q- The upper limit of the 95% confidence interval is? Q- Thus, the 95% confidence interval for the average weight of all quarters ranges from ? grams to ? grams.

Expert Solution

You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters has a mean weight of 5.643 grams and a standard deviation of 0.065 grams. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. Q-

The mean weight of all quarters is approximately 5.643 grams

Q- The lower limit of the 95% confidence interval is 5.6245

Q- The upper limit of the 95% confidence interval is 5.6615

Q- Thus, the 95% confidence interval for the average weight of all quarters ranges from 5.6245 grams to 5.6615 grams.

Confidence Interval Estimate for the Mean

Data
Sample Standard Deviation s	0.065
Sample Mean	5.643
Sample Size n	50
Confidence Level	95%

Intermediate Calculations
Standard Error of the Mean	0.0092
Degrees of Freedom	49
t Value	2.0096
Interval Half Width	0.0185

Confidence Interval
Interval Lower Limit	5.6245
Interval Upper Limit	5.6615

milcah answered 1 year ago

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You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters...

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