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QUESTION
a survey found that the american fanmily generates 17.2 pounds of glass garbage each year. assume the standard deviation of the distribution is 2.
a survey found that the american fanmily generates 17.2 pounds of glass garbage each year. assume the standard deviation of the distribution is 2.5pounds, what is the probability that the mean of a sample of 55 families is between 17 and 18 pounds.
