condition mean min max ZT0-3 120.485991 120.485991 120.485991 ZT4-7 81.6833825 81.6833825 81.6833825 ZT8-11 57.339011 57.339011 57.339011 ZT12-15 77.1361005 77.1361005 77.1361005 ZT16-19 87.133104 87.133104 87.133104 ZT20-23 132.22172799999998 132.22172799999998 132.22172799999998