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    Vehicle Mileage Statistical Analysis

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    The Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean = 24.8 miles per gallon and a standard deviation a = 6.2 miles per gallon for highway driving. Assume a normal distribution.

    Use this information to answer questions #13 - #14.

    (13) Use Table 4 (Standard Normal probability table), software, or the TI-83 to find the probability that a randomly selected automobile gets between 31 mpg and 37 mpg.

    14) Find the gas mileage of the worst 2.5% of all cars. Transform a z-score into an x-value.

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    https://brainmass.com/statistics/z-test/vehicle-mileage-statistical-analysis-171801

    Solution Preview

    Please see the attachments.
    Calculations are in excel.

    The Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean = 24.8 miles per gallon and a standard deviation a = 6.2 miles per gallon for highway driving. Assume a normal distribution.
    Use this information to answer questions #13 - #14.
    (13) Use Table 4 ...

    Solution Summary

    The solution to questions proposed, complete with calculations/formula. Standard normal probability tables are provided.

    $2.49

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