- A Large Manufacturing Plant Uses Lightbulbs With Lifetimes That Are Normally Distributed With A Mean Of 1000 Hours And A 1 (42.76 KiB) Viewed 12 times
A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and a
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A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and a
A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and a standard deviation of 80 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