Boys and girls: The National Health Statistics Reports reported that a sample of 315 one-year-old boys had a mean weight of 25.5 pounds with a stan deviation of 3.1 pounds. In addition, a sample of 293 one-year-old girls had a mean weight of 24.0 pounds with a standard deviation of 3.5 pounds. Part: 0 / 2 Part 1 of 2 Construct a 98% confidence interval for the difference between the mean weights. Let 0y denote the mean weight of one-year-old boys. Use tables 1 the critical value and round the answers to at least one decimal place. A 98% confidence interval for the difference between the mean weights is ' '