Question: A normally distributed process has specifications of LSL = 75 and USL = 85 on the output. A random sample of 25 parts indicates that

A normally distributed process has specifications of LSL = 75 and USL = 85 on the output. A random sample of 25 parts indicates that the process is centered at the middle of the specification band and the standard deviation is s = 1.5.

(a) Find a point estimate of Cp.

(b) Calculate the fraction of nonconforming units (i.e., the units that fall outside the specification limits.)

(d) What is the fraction of nonconforming units after the shift?

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1. Empirical or factual information,