condition mean min max ZT0-3 37.83685 37.83685 37.83685 ZT4-7 30.0619 30.0619 30.0619 ZT8-11 40.11945 40.11945 40.11945 ZT12-15 49.3645 49.3645 49.3645 ZT16-19 52.87455 52.87455 52.87455 ZT20-23 45.619299999999996 45.619299999999996 45.619299999999996