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The life of a Goldline auto battery is normally distributed with a mean of 42.5 months and a standard deviation
of 6.5. The battery warranty is 36 months. What is the probability that a battery will last for 52 months?

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Answer:

If quick start does not want to make refunds for more than 5% of its batteries under the full refund guarantee policy for how long should the company guarantee the batteries to the nearest month )?

If Quick Start does not want to replace more than 10% of its batteries for how long should the company guarantee the batteries? They should guarantee the batteries for 35 months.

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