condition mean min max ZT0-3 230.369258 230.369258 230.369258 ZT4-7 329.6602005 329.6602005 329.6602005 ZT8-11 289.1422215 289.1422215 289.1422215 ZT12-15 305.87561 305.87561 305.87561 ZT16-19 243.2026715 243.2026715 243.2026715 ZT20-23 269.21374449999996 269.21374449999996 269.21374449999996