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    Statistics - Hypothesis test for the Population Mean

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    Citrus Rental is a popular car rental agency that has a history of having too few cars so that its available cars are overdriven. The mean monthly mileage over the years .... (Please see the attached file)

    © BrainMass Inc. brainmass.com December 24, 2021, 7:54 pm ad1c9bdddf
    https://brainmass.com/statistics/hypothesis-testing/statistics-hypothesis-test-population-mean-229055

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    SOLUTION This solution is FREE courtesy of BrainMass!

    H0: The mean mileage of the cars is 1550 miles, that is m = 1550

    Ha: The mean mileage is less than 1550 miles, that is m < 1550

    Lower-tailed t- test for a population mean; a = 0.10

    t = (x-bar - m)/(s/sqrt n) = (1472 - 1550)/(213/sqrt 22) = -1.7176

    Degrees of freedom = 22 - 1 = 21

    For 21 degrees of freedom and for a = 0.10, the p- value for t = -1.7176 is 0.0503

    Since 0.0503 < 0.10, we reject H0 and accept H1

    Conclusion: The mean mileage appears to have reduced and is less than 1550 miles.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 7:54 pm ad1c9bdddf>
    https://brainmass.com/statistics/hypothesis-testing/statistics-hypothesis-test-population-mean-229055

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