Question: Suppose that a quality characteristic has a normal distribution with specification limits at USL = 100 and LSL = 90. A random sample of 30

Suppose that a quality characteristic has a normal 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.

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