. Find a 99% confidence interval for the true mean body mass index (BMI), at 4 months, of patients in the medicalmanagement group.

Body-mass index No. of patients evaluated 227 180 Value 30.746.3 30.4+6.4Medical-Management Group (N =227) Baseline 4 MoMedical-Management Group PTAS Group Variable (N=227) (N=224) Baseline 4 Mo Baseline 4 Mo Clinical factor Blood pressure No. of patients evaluated 227 179 220 173 Systolic - mm Hg 146.8421.8 134.8+17.0 143.9+20.6 133.1415.9 Diastolic - mm Hgt 82.3+12.0 77.3+10.0 77.9+10.7 76.219.7 Lipids No. of patients evaluated 226 175 219 174 LDL cholesterol - mg/dl 97.7+36.6 72.8+26.0 96.3438.5 75.9+40.9 HDL cholesterol - mg/dl 38.8+10.1 41.9411.4 37.8+10.6 43.2+13.3 Non-HDL cholesterol - mg/dl 116.6+40.3 90.9430.8 116.6+43.9 94.3+50.2 Glycated hemoglobin in patients with diabetes No. of patients evaluated 98 47 102 50 Level of glycated hemoglobin -% 8.3+2.3 7.5+2.0 7.942.1 7.8+2.4 Body-mass index 1 No. of patients evaluated 227 180 224 170 Value 30.746.3 30.4+6.4 30.346.2 30.0+6.2