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    The Level of Confidence and the Mean Weight of Luggage

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    A trans-oceanic airline conducted a study to determine whether the average weight of baggage checked by a passenger differs significantly from 45 pounds. A random sample of 25 passenger baggages recorded a mean weight of 43.5 pounds with a standard deviation 6 pounds. Can the airline conclude that the mean weight of checked baggage is significantly different from 45 pounds at a 95% level of confidence?

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    https://brainmass.com/statistics/hypothesis-testing/compute-level-of-confidence-182505

    Solution Preview

    Since the sample size n=25 is not very big (not >=30), we should use t-test.

    Null hypothesis H0: mu=45
    Alternative hypothesis Ha: mu is not equal to 45.

    Given xbar=43.5, s=6 and n=25. So, ...

    Solution Summary

    This solution calculates the mean weight of luggage in an airline.

    $2.19

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