condition mean min max ZT0-3 36.167544955 35.93720638 36.39788353 ZT4-7 39.584998666666664 39.08587268 40.08412465333333 ZT8-11 38.82700165 37.941041320000004 39.71296198 ZT12-15 40.393358406666664 39.42043038333333 41.36628643 ZT16-19 39.09646425 38.5590396 39.6338889 ZT20-23 39.832033755 39.71936673 39.94470078