condition mean min max ZT0-3 226.4 226.4 226.4 ZT4-7 134.1 134.1 134.1 ZT8-11 172.85 172.85 172.85 ZT12-15 196.9 196.9 196.9 ZT16-19 206.25 206.25 206.25 ZT20-23 165.25 165.25 165.25