Mathematics, 20.09.2020 06:01, ari9425
A manufacturer of bulbs for movie projectors finds that the lives of the bulbs are normally distributed with a mean of 61 hours and a standard deviation of 6.3 hours. The manufacturer will guarantee the bulbs so that only 3% will be replaced because of failure before the guaranteed number of hours. For how many hours should the bulbs be guaranteed?
Answers: 3
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A manufacturer of bulbs for movie projectors finds that the lives of the bulbs are normally distribu...
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