The lifespan of refrigerators is normally distributed with mean 14 years and standard deviation 2...
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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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