condition mean min max ZT0-3 3.45 3.45 3.45 ZT4-7 4.2 4.2 4.2 ZT8-11 4.05 4.05 4.05 ZT12-15 3.85 3.85 3.85 ZT16-19 3.45 3.45 3.45 ZT20-23 5.8999999999999995 5.8999999999999995 5.8999999999999995