condition mean min max ZT0-3 196.05 196.05 196.05 ZT4-7 77.5 77.5 77.5 ZT8-11 111.25 111.25 111.25 ZT12-15 111.19999999999999 111.19999999999999 111.19999999999999 ZT16-19 172.8 172.8 172.8 ZT20-23 180.25 180.25 180.25