(Answered) Question a survey found that an american family generates

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Question: A survey found that an American Family generates an average of 17.2 lb of glass garbage each year. Assume that the standard deviation of the distribution is 2.5 pounds. If a sample of 55 families is randomly selected, find the probability that the sample mean is

a.) between 12 and 18 lb?

b.) below 16 lb?

c.) Above 18lb?

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