condition mean min max ZT0-3 146.3 146.3 146.3 ZT4-7 172.8 172.8 172.8 ZT8-11 211.3 211.3 211.3 ZT12-15 193.55 193.55 193.55 ZT16-19 141.65 141.65 141.65 ZT20-23 163.2 163.2 163.2