A researcher conducts a mileage economy test involving 90 cars. The frequency distribution describing average miles per

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answerhappygod
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A researcher conducts a mileage economy test involving 90 cars. The frequency distribution describing average miles per

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A researcher conducts a mileage economy test involving 90 cars.
The frequency distribution describing average miles per gallon
(mpg) appears in the following table.
a-1. Construct the relative frequency
distribution and the cumulative relative frequency
distribution. (Round your answers to 4 decimal
places.)
a-2. What proportion of the cars got more
than 35 mpg but no more than 40 mpg? (Round your
answer to 4 decimal places.)
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