Question
The life of light bulbs is distributed normally. The standard deviation of the lifetime is20 20hours and the mean lifetime of a bulb is570 570hours.
The life of light bulbs is distributed normally. The standard deviation of the lifetime is20
20hours and the mean lifetime of a bulb is570
570hours. Find the probability of a bulb lasting for between533
533and581
581hours. Round your answer to four decimal places.
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Mathematical Excursions
Authors: Richard N Aufmann, , Joanne Lockwood, Richard D Nation, Daniel K Clegg
3rd Edition
1305161793, 9781305161795
