A survey found that the American family generates an average of17.2pounds of glass garbage each year. Assume the standard deviation of the distribution is2.5 pounds. Find the probability that the mean of a sample of57 families will be between17.2and18.2 pounds. Assume that the sample is taken from a large population and the correction factor can be ignored. Round your final answer to four decimal places and intermediatez-value calculations to two decimal places.