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The weights of 90 newborn infants was measured at a metropolitan city.The sample meanwas 8.5 pounds. Newborn infants are known to have a standard deviation

The weights of 90 newborn infants was measured at a metropolitan city.The sample meanwas 8.5 pounds. Newborn infants are known to have a standard deviation of =1.6 pounds. Construct a 90% and a 95% confidence interval for the mean weight of newborn infants in this city. Summarize your results.

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