condition mean min max ZT0-3 44.276096 44.276096 44.276096 ZT4-7 80.10763299999999 80.10763299999999 80.10763299999999 ZT8-11 106.090306 106.090306 106.090306 ZT12-15 83.29667549999999 83.29667549999999 83.29667549999999 ZT16-19 95.332964 95.332964 95.332964 ZT20-23 65.7940235 65.7940235 65.7940235