According to the Centers for Disease Control and Prevention (CDC), obesity rates among U.S. children have increased dramatically over the past three decades, from a low of about 5% to 18% as of 2010. A study examined the effect of family-based food-counseling sessions provided by trained professionals. The study randomly assigned obese children aged 9 to 12 years to either the counseling intervention or a control group not receiving any food counseling. The children's weight changes (in pounds, lb) after 15 weeks are displayed in the table for both conditions. Intervention 16.7 14.8 11.9 9.7 9.6 8.8 8.0 7.1 6.6 6.0 5.6 5.6 5.5 5.5 5.1 5.0 5.0 4.8 4.4 4.4 4.1 4.0 4.0 3.6 3.5 3.2 2.8 2.0 1.8 1.8 1.4 1.2 0.2 0.1 0.0 0.2 0.6 1.0 1.2 1.2 14 18 20 22 25 28 33 42 54 53 6.0 6.4 8.4 \fGive a 95% condence interval for the difference in mean weight change after 15 weeks for obese children who receive professional food counseling and obese children who do not. Express the interval in the form lower bound to upper bound. (Enter your answers rounded to two decimal places.)