Refer to Exercise 21.30. If the lower and upper specification limits are 995  c and 1005 cc, respectively, what is C_pk?

In exercise 21.30

KW Paints is a company that manufactures various kinds of paints and sells them in 1- and 4-liter cans. The cans are filled on an assembly line with an automatic valve regulating the amount of paint. If the cans are overfilled, paint and money will be wasted. If the cans are under filled, customers will complain. To ensure that the proper amount of paint goes into each can, statistical process control is used. Every hour, five cans are opened, and the volume of paint is measured. The results from the last 30 hours from the l-liter production line were recorded. To avoid rounding errors, we recorded the volumes in cubic centimeters (cc) after subtracting 1,000. Thus, the file contains the amounts of overfill and underfill. Draw the x and S charts to determine whether the process is under control.