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A survey found that the american family generates an average of 17.2 pounds of glass garbage each year.Assume the standard deviation of the...

A survey found that the american family generates an average of 17.2 pounds of glass garbage each year.Assume the standard deviation of the distribution is 2.5 poumds. Find the probability that the mean of a sample of 55 families will be between 17 and 18 pounds.

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