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

40

quarters has a mean weight of

5.666

grams and a standard deviation of

0.059

gram. 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.

The mean weight of all quarters is approximately

5.666

grams.

(Round to the nearest thousandth as needed.)

Find the 95% confidence interval for the average weight of all quarters.

nothing

gless than

muless thannothing

g

(Round to the nearest thousandth as needed.)