According to a recent report, a sample of 300 one-year-old baby boys in the United States had a mean weight of 25.5 pounds. Assume the population standard deviation is =5.5 pounds.

Construct a

99%

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.

A

99%

confidence interval for the mean weight in pounds of all one-year-old baby boys in the United States is