Question: Ten bearings made by a certain process have a mean diameter of (0.5060 mathrm{~cm}) and a standard deviation of (0.0040 mathrm{~cm}). Assuming that the data

Ten bearings made by a certain process have a mean diameter of $0.5060 \mathrm{~cm}$ and a standard deviation of $0.0040 \mathrm{~cm}$. Assuming that the data may be looked upon as a random sample from a normal population, construct a 95\% confidence interval for the actual average diameter of bearings made by this process.

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