Mathematics, 19.09.2019 00:30 madiness05
Age lightbulb is supposed to last for 1,200 hours. in fact, light bulbs of this type last only 1,185 hours with a standard deviation of 70 hours. what is the probability that a sample of 100 lightbulbs will have an average life of at least 1,200 hours? mathematics
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Age lightbulb is supposed to last for 1,200 hours. in fact, light bulbs of this type last only 1,185...
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