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Diagrams of the normal distribution are almost mandatory Suppose that battery lives are normally distributed with a...

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Basic Math

Diagrams of the normal distribution are almostmandatory

Suppose that battery lives are normally distributed with a mean of12.85 hours and a standard deviation of 1.93 hours. What is theminimum sample size that would be required so that the probabilityof obtaining a sample mean above 13.5 hours is less than 1%?

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