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From measuring the diameters of an initial run of 12 parts, you calculate a sample mean of 52.25 mm and a sample standard deviation of

From measuring the diameters of an initial run of 12 parts, you calculate a sample mean of 52.25 mm and a sample standard deviation of 0.65 mm. You believe that the diameters of the parts produced by this process are normally distributed.

Construct a 95% two-sided confidence interval on the mean diameter of this process given this sample data.

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