condition mean min max ZT0-3 173.95 173.95 173.95 ZT4-7 108.9 108.9 108.9 ZT8-11 152.85 152.85 152.85 ZT12-15 164.55 164.55 164.55 ZT16-19 202.7 202.7 202.7 ZT20-23 192.3 192.3 192.3