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In analyzing the city and highway fuel efficiencies of many cars and​ trucks, the mean difference...

In analyzing the city and highway fuel efficiencies of many cars and​ trucks, the mean difference in fuel efficiencies for the 631 vehicles was 7.49 mpg with a standard deviation of 2.53mpg. Find a​ 95% confidence interval for this difference and interpret it in context.

The​ 95% confidence interval for the difference in fuel efficiencies is left parenthesis nothing comma nothing right parenthesis, mpg.

​(Round to two decimal places as​ needed.)

Math   Statistics-And-Probability   
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