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The lifespan of refrigerators is normally distributed with mean 14 years and standard deviation 2.4 years. If 14 refrigerators are randomly selected, there is

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The lifespan of refrigerators is normally distributed with mean 14 years and standard deviation 2.4 years. If 14 refrigerators are randomly selected, there is a 72% probability that the mean lifespan of the selected refrigerators is between what two values? If there are two answers, list both answers separated by a comma.

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