In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 608 vehicles was $7.49 mpg$ with a standard deviation of $2.49 mpg$ . Find a $95%$ confidence interval for this difference and interpret it in context. The $95%$ confidence interval for the difference in fuel efficiencies is (Round to two decimal places as needed.)

Question

In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 608 vehicles was

7.49 mpg

with a standard deviation of

2.49 mpg

. Find a

95%

confidence interval for this difference and interpret it in context. The

95%

confidence interval for the difference in fuel efficiencies is (Round to two decimal places as needed.)

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