In the shaft process discussed in the chapter,

1. What is the probabilityof finding a shaft at least 3 sigma (0.0020″) over 1.000″ in diameter? If the probability of 0.05 or greater is unacceptable, is the shaft process acceptable?

2. What is the probability of getting a shaft below 0.9975″ in diameter? If the probability of 0.05 or greater is unacceptable, is the shaft process acceptable?

See the attached file.

The solution determines the normal distribution shaft.