condition mean min max ZT0-3 60.024334 60.024334 60.024334 ZT4-7 114.1847765 114.1847765 114.1847765 ZT8-11 149.76601449999998 149.76601449999998 149.76601449999998 ZT12-15 134.28020500000002 134.28020500000002 134.28020500000002 ZT16-19 108.807158 108.807158 108.807158 ZT20-23 61.111168 61.111168 61.111168