condition mean min max ZT0-3 52.694535 52.694535 52.694535 ZT4-7 47.5132955 47.5132955 47.5132955 ZT8-11 49.092252 49.092252 49.092252 ZT12-15 58.771816 58.771816 58.771816 ZT16-19 73.096323 73.096323 73.096323 ZT20-23 83.05982399999999 83.05982399999999 83.05982399999999