condition mean min max ZT0-3 4.95 4.95 4.95 ZT4-7 23.8 23.8 23.8 ZT8-11 3.6500000000000004 3.6500000000000004 3.6500000000000004 ZT12-15 18.55 18.55 18.55 ZT16-19 10.95 10.95 10.95 ZT20-23 10.9 10.9 10.9