condition mean min max ZT0-3 316.891988 316.891988 316.891988 ZT4-7 352.785854 352.785854 352.785854 ZT8-11 604.810763 604.810763 604.810763 ZT12-15 374.0035715 374.0035715 374.0035715 ZT16-19 262.061411 262.061411 262.061411 ZT20-23 310.73440650000003 310.73440650000003 310.73440650000003