The useful lifetime of a brand of automobile battery is normally distributed with mean 1,100 days and standard deviation 80 days. For how long should these batteries be guaranteed if the manufacturer wants to replace only five percent of the batteries sold because they "died" before the guarantee expired?
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The Answer of The useful lifetime of a brand of automobile battery is normally distributed with mean 1,100 days and standard deviation 80 days. For how long should these batteries be guaranteed if the manufacturer wants to replace only five percent of the batteries sold because they "died" before the guarantee expired?
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The Useful Lifetime of a Brand of Automobile Battery Is