condition mean min max ZT0-3 134.6 134.6 134.6 ZT4-7 91.2 91.2 91.2 ZT8-11 74.0 74.0 74.0 ZT12-15 163.75 163.75 163.75 ZT16-19 213.15 213.15 213.15 ZT20-23 172.1 172.1 172.1