Question
The lifetime in hours of the lightbulbs manufactured by a certain factory is a random variable with a mean of 750 and standard deviation of
The lifetime in hours of the lightbulbs manufactured by a certain factory is a random variable with a mean of 750 and standard deviation of 50.
(a) What can be said about the probability that a random light bulb lasts between 600 and 9000 hours?
(b) What can be said about the probability that a random light bulb lasts at least 1000 hours?
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Understanding Analysis
Authors: Stephen Abbott
2nd Edition
1493927124, 9781493927128
