A manufacturer wants to state a specific guarantee for the life of a product with a replacement
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A manufacturer wants to state a specific guarantee for the life of a product with a replacement for failed products. The distribution of lifetimes of the product is normal and has a mean of 1000 days and standard deviation of 150 days. What life length should be stated in the guarantee so that only 10% of the products need to be replaced?
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Related Book For 
Statistical Methods
ISBN: 9780128230435
4th Edition
Authors: Donna L. Mohr, William J. Wilson, Rudolf J. Freund
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