In analyzing the city and highway fuel efficiencies of many cars andtrucks, the mean difference in fuel efficiencies for the 634

vehicles was 7.48

mpg with a standard deviation of 2.52

mpg. Find a95% confidence interval for this difference and interpret it in context.

The95% confidence interval for the difference in fuel efficiencies is left parenthesis nothing comma nothing right parenthesis(,) mpg. (Round to two decimal places asneeded.)