condition mean min max ZT0-3 97.7501 66.4828 114.60300000000001 ZT4-7 57.05165 57.05165 57.05165 ZT8-11 54.419200000000004 54.419200000000004 54.419200000000004 ZT12-15 68.655825 68.34195 68.96969999999999 ZT16-19 83.12545 83.12545 83.12545 ZT20-23 111.40950000000001 111.40950000000001 111.40950000000001