Managing for Quality and Performance Excellence 9th Edition by James Evans,William Lindsay

Exercise 47

The dimension of a machined part has a nominal specification of 11.9 cm. The process that produces the part can be controlled to have a mean value equal to this specification, but has a standard deviation of 0.05 cm. What is the probability that a part will have a dimension
a. exceeding 12 cm?
b. between 11.9 and 11.95 cm?
c. less than 11.83 cm?