Suppose that a quality characteristic has a normal distribution with
Suppose that a quality characteristic has a normal distribution with
Suppose that a quality characteristic has a normal distribution with specification limits at USL = 100 and LSL = 90. A random sample of 30 parts results in x = 97 and s = 1.6.
(a) Calculate a point estimate of Cpk.
(b) Find a 95% confidence interval on Cpk.