condition mean min max ZT0-3 10.6351 10.6351 10.6351 ZT4-7 62.87905 62.87905 62.87905 ZT8-11 28.2121 28.2121 28.2121 ZT12-15 4.733045 4.733045 4.733045 ZT16-19 1.8606699999999998 1.8606699999999998 1.8606699999999998 ZT20-23 4.9373249999999995 4.9373249999999995 4.9373249999999995