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Find the probability that a dishwasher

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A dishwasher has a mean life of 10 years with an estimated standard deviation of 1.25 years. Assume the life of a dishwasher is normally distributed.

A.) Find the probability that a dishwasher will last between 8 and 10 years.

B.) A manufacturer of dishwashers only wants to replace free of charge 5% of all dishwashers. How long should the manufacturer make the warranty period?

Reference no: EM132643105

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