condition mean min max ZT0-3 5.05 5.05 5.05 ZT4-7 4.8 4.8 4.8 ZT8-11 2.25 2.25 2.25 ZT12-15 3.5 3.5 3.5 ZT16-19 32.85 32.85 32.85 ZT20-23 7.449999999999999 7.449999999999999 7.449999999999999