Question: To improve a process capability from 3 to 6 (without 1.5 mean shift) in 20 years, how much improvement each year must make on average?

To improve a process capability from 3 to 6 (without 1.5 mean shift) in 20 years, how much improvement each year must make on average?

a. 0.6279

b. 0.7562

c. 0.2679

d. 0.5063

e. 0.8471

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