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    Hypothesis testing problem

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    A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows:
    4.85 4.80 4.89 4.82 4.94 4.96 4.96 4.83 4.80 4.84 4.95 4.88
    Assuming that = 0.10, test the hypothesis that the population mean is equal to 5.
    · State the null and alternate hypotheses
    · Calculate the mean and standard deviation
    · Determine which test statistic applies, and calculate it
    · Determine the critical value(s).
    · State your decision: Should the null hypothesis be rejected?

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    https://brainmass.com/statistics/hypothesis-testing/hypothesis-testing-problem-289192

    Solution Preview

    Test hypothesis
    A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows:
    4.85 4.80 4.89 4.82 4.94 4.96 4.96 4.83 4.80 4.84 4.95 4.88
    Assuming that = 0.10, test the hypothesis that the population mean is equal to 5.

    State the null ...

    Solution Summary

    The solution provides step by step method for the calculation of test statistic . Formula for the calculation and Interpretations of the results are also included.

    $2.19

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