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Automotive Fuel Efficiency Thirty-one automobiles were tested for fuel efficiency (in miles per gallon). The following frequency distribution was obtained. Class boundaries Frequency 7.5 -

Automotive Fuel EfficiencyThirty-one automobiles were tested for fuel efficiency (in miles per gallon). The following frequency distribution was obtained.

Class boundaries Frequency

7.5 - 12.5 5

12.5 - 17.5 5

17.5 - 22.5 13

22.5 - 27.5 6

27.5 - 32.5 2

Find the variance and standard deviation. Round your answers to at least one decimal place.

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