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The manufacturer claims that your new car gets 24 mpg on the highway. You suspect that the mpg is less for your car. The 46

The manufacturer claims that your new car gets 24 mpg on the highway. You suspect that the mpg is less for your car. The 46 trips on the highway that you took averaged 21.4 mpg and the standard deviation for these 46 trips was 5.5 mpg. What can be concluded at the a=0.05 level of significance?

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