Based on past experience, a package-filling machine has been found to have a process standard deviation of 0.65 ounces of product weight (i.e., Sigma2 = 0.65 ounces).

We desire to take a simple random sample of packages from this machine's output for the purpose of determining the average weight of product being packed by the machine.

If we wish to have 95% confidence that the sample mean we observe will not differ from the actual (or "true") population mean by more than 0.1 ounces, what sample size should we take?