Question: A normally distributed quality characteristic has specification limits at LSL = 50 and USL = 60. A random sample of size 35 results in x

A normally distributed quality characteristic has specification limits at LSL = 50 and USL = 60. A random sample of size 35 results in x = 55.5 and sigma = 1.0.

a. Calculate a point estimate of Cpk.

b. Find a 95% confidence interval on Cpk.

c. Is this a 6-sigma process?

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