A filler machine in a food processing plant is set so that the mean fill is 16 ounces. When the process is in control, the actual load per can should vary this mean in a random manner with a variance...

A filler machine in a food processing plant is set so that the mean fill is 16 ounces.
When the process is in control, the actual load per can should vary this mean in a random
manner with a variance that remains stable over time. Suppose a process that has been

operating for a period of time shows the following readings: 15.87, 16.14, 15.98, 16.03,
16.05, 16.1, 16.08, 15.94. Construct a 95% confidence interval for population mean.