condition mean min max ZT0-3 37.385450000000006 36.0127 38.7582 ZT4-7 27.6058 27.6058 27.6058 ZT8-11 45.5678 45.5678 45.5678 ZT12-15 0 0 0 ZT16-19 54.5728 54.5728 54.5728 ZT20-23 57.647400000000005 57.647400000000005 57.647400000000005