What percent of batteries have a life span of more value

Reference no: EM13145954

The life span of a battery is normally distributed with a mean of 2200 hours and a t percent of batteries have a life standard deviation of 60 hours. What percent of batteries have a life span that is more than 2275 hours? Would it be unusual for a battery to have a life span that is more than 2275 hours? Explain your reasoning.

Reference no: EM13145954

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