condition mean min max ZT0-3 125.65 125.65 125.65 ZT4-7 162.0 162.0 162.0 ZT8-11 172.2 172.2 172.2 ZT12-15 146.05 146.05 146.05 ZT16-19 145.05 145.05 145.05 ZT20-23 143.1 143.1 143.1