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    Variance on Miles per Gallon

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    Students in a high school class have collected data on the gas mileage of their parents cars. The data are summarized in the table below.

    Gas Mileage (based on miles per gallon)
    Mean - 22.7
    Median - 24
    Variance - 16.8

    The students would like to convert the results to kilometers per liter to compare the results with a class in Holland. If 1 mile/gallon = .425 kilometers/liter, make a table showing the correct conversion for each statistical parameter.

    Mean - 9.65
    Median - 10.20
    What is the variance and how is it obtained?

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    Solution Preview

    Variance can be thought of as having units equivalent to square of the units for mean. Why? Because variance is ...

    Solution Summary

    The solution gives an explanation of how the variance is calculated, with the final answer.