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    using a z-score to determine the number of defective items in a production process.

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    Question: A manufacturing process produces units that average 10 inches in length with a standard deviation of 3.2 inches. If only those units between 9.5 and 10.5 inches can be sued, how many out of sample of 100 must be thrown away?

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    Solution Preview

    This is a confidence interval question:
    The acceptable range is 10.5-10=0.5 inch
    The standard error is ...

    Solution Summary

    the following exercise shows the process for calculating the probability that an item is defective given a sample from a manufacturing process.