condition mean min max ZT0-3 82.761992 82.761992 82.761992 ZT4-7 122.2982575 122.2982575 122.2982575 ZT8-11 118.20006849999999 118.20006849999999 118.20006849999999 ZT12-15 117.3597345 117.3597345 117.3597345 ZT16-19 74.3355505 74.3355505 74.3355505 ZT20-23 90.1059295 90.1059295 90.1059295