According to a recent report, a sample of240one-year-old baby boys in the United States had a mean weight of25.5pounds. Assume the population standard deviation is=5.1 pounds.

Construct an80% confidence interval for the mean weight of all one-year-old baby boys in the United States. Round the answer to at least one decimal place. An80%confidence interval for the mean weight in pounds of all one-year-old baby boys in the United States is(___) < < (___)