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    The management of White Industries is considering a new method of assembling its golf cart. The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?

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    Solution Preview

    We can set up

    Null hypothesis H0: mu=42.3
    Alternative hypothesis Ha: mu<42.3

    Given xbar=40.6, s=2.7 and n=24. Use t-test, we ...

    Solution Summary

    The solution contains detailed explanation of testing hypotheses using the five-step procedures.