A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean
Question: A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and a standard deviation of 50 hours. To minimize the number of bulbs that burn out during operation hours, all bulbs are replaced at once. How often should the bulbs be replaced so that no more than 1% burn out between replacement periods?
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Solution Format: Word Document
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