Pearson eText for Basic Business Statistics -- Instant Access (Pearson+)
Pearson eText for Basic Business Statistics -- Instant Access (Pearson+)
14th Edition
ISBN: 9780137400119
Author: MARK BERENSON, David Levine
Publisher: PEARSON+
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Chapter 6, Problem 13PS

Many manufacturing problems involve the matching of machine parts, such as shafts that fit into a value hole. A particular design requires a shaft with a diameter of 22.000 mm, but shifts with diameters between 21.990 mm and 22.010 mm are acceptable. Suppose that the manufacturing process yields shafts with diameters normally distributed, with a mean of 22.002 mm and a standard deviation of 0.005 mm. For this process, what is

a. the proportion of shafts with a diameter between 21.99 mm and 22.00 mm?

b. the probability that a shaft is acceptable?

c. the diameter that will be exceeded by only two percent of the shafts?

d. What would be your answer in a through c if the standard deviation of the shaft diameters were 0 .004 mm?

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