Suppose a stable process has upper and lower specification limits at USL = 42 and LSL = 28. A sample size of n = 10. This process reveals that the process mean is 35 and the sample standard deviation is 1.5. a) (5 pts) Calculate the Process Capability Ratios (PCRs), Cp and Cpk. b) (10 pts) Find an approximate 95% Confidence Interval for Cp. What are your conclusions?
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