# Question

A normally distributed quality characteristic has specification limits at LSL = 10 and USL = 20. A random sample of size 50 results in x =16 and s =1.2 .

(a) Calculate a point estimate of Cpk.

(b) Find a 95% confidence interval on Cpk.

(a) Calculate a point estimate of Cpk.

(b) Find a 95% confidence interval on Cpk.

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