The lifetime of a certain type of battery is normally distributed with mean value 12 hours and standard deviation 1 hour. there

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3 years ago

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The lifetime of a certain type of battery is normally distributed with mean value 12 hours and standard deviation 1 hour. there

are four batteries in a package. what lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (round your answer to two decimal places.)

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1 answer:

Phoenix [80] · Answer 1 · 2022-01-16T19:52:47+03:00

Phoenix [80]3 years ago

3 0

In most cases for this type of questions you would have to use a calculator, since this is not a value that can be approximated. Do you have an inverse normal function on your graphical calculator?