Question: A company is evaluating the quality of aluminum rods received
A company is evaluating the quality of aluminum rods received in a recent shipment. Diameters of aluminum alloy rods produced on an extrusion machine are known to have a standard deviation of 0.0001 in. A random sample of 25 rods has an average diameter of 0.5046 in. Test whether or not the mean rod diameter is 0.5025 using a two-sided confidence interval.
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