A production department uses a sampling procedure to test the quality of
newly produced items. The department employs the following decision rule at
an inspection station: If a sample of 14 items has a variance of more than
0.005, the production line must be shut down for repairs. Suppose the
following data have just been collected.
3.43 3.45 3.43 3.48 3.52 3.50 3.39
3.48 3.41 3.38 3.49 3.45 3.51 3.50
Required:
Should the production line be shut down? Explain.