Posted by **Mallory** on Sunday, December 5, 2010 at 5:24pm.

A production process is considered to be out of control if the produced parts have lengths with a standard deviation greater than .5 mm. A sample of 41 parts yields a sample standard deviation of .58 mm. At the .05 significance level, does this sample indicate that the process should be adjusted in order to correct the standard deviation of the product? Assume the lengths have a normal distribution.

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