The specification for a plastic liner for concrete highway projects calls for a thickness of 10.0 mm ± 0.2mm. The standard deviation of the process is estimated to be 0.08 mm. The process is known to operate at a mean thickness of 10.1 mm. Assume that the thickness is normally distributed.
4.1 What are the Cp and Cpk for this process?
4.2 About what percentage of all units of this liner will meet specifications?