What percent of batteries will fail in less than months

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Reference no: EM13157184

A sample of automobile batteries is tested. The distribution of battery life is found to be mound-shaped and symmetrical (normal) with a mean life of 48 months and a standard deviation of six months. The batteries carry a 12-month guarantee. What percent of batteries will fail in less than 12 months?

Reference no: EM13157184

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