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STATS - If light bulbs have lives that are normally distributed

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solution


Question

Question;If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, use the 68-95-99.7 rule to approximate the percentage of light bulbs having a life between 2000 hours and 3500 hours?

 

Paper#61691 | Written in 18-Jul-2015

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