condition mean min max ZT0-3 29.3634 29.3634 29.3634 ZT4-7 18.89995 18.89995 18.89995 ZT8-11 18.203699999999998 18.203699999999998 18.203699999999998 ZT12-15 21.68495 21.68495 21.68495 ZT16-19 29.24035 29.24035 29.24035 ZT20-23 27.519 27.519 27.519