Mathematics, 18.05.2021 01:00 tylorwsimmons
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The batteries from a certain manufacturer have a mean lifetime of 890 hours, with a standard deviation of 90 hours. Assuming that the lifetimes are normally
distributed, complete the following statements.
(a) Approximately 95% of the batteries have lifetimes between___hours and___
hours.
(b) Approximately _?_
of the batteries have lifetimes between 620 hours and 1160 hours.
Answers: 3
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The batteries from a certain manufacturer have a mean lifetime of 890 hours, wi...
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