An elevator rail is assumed to meet specifications if its diameter is between 0.98 and 1.01 inches.
Question:
a. What standard deviation (within 0.001 inch) minimizes the annual cost of producing elevator rails? You do not need to try standard deviations in excess of 0.02 inch.
b. For your answer in part a, one elevator rail in 1000 will be at least how many inches in diameter?
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Related Book For
Data Analysis and Decision Making
ISBN: 978-0538476126
4th edition
Authors: Christian Albright, Wayne Winston, Christopher Zappe
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