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A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1500 hours and a
Posted: Wed Jul 06, 2022 12:10 pm
by answerhappygod
- A Large Manufacturing Plant Uses Lightbulbs With Lifetimes That Are Normally Distributed With A Mean Of 1500 Hours And A 1 (9.04 KiB) Viewed 14 times
A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1500 hours and a standard deviation of 90 hours. To minimize the number of bulbs that burn out during operating hours, all bulbs are replaced at once. How often should the bulbs be replaced so that only 1% burn out between replacement periods? (Round your answer to one decimal place.) hr