Fuel Expenditures. In estimating the mean monthly fuel expenditure, µ, per household vehicle, the Energy Information Administration takes a sample of size 6841. Assuming that s = $20.65, determine the...

Fuel Expenditures.
In estimating the mean monthly fuel expenditure, µ, per household vehicle, the Energy Information Administration takes a sample of size 6841. Assuming that s = $20.65, determine the margin of error in estimating µ at the 95% level of confidence.