condition mean min max ZT0-3 24.236224999999997 20.10205 28.3704 ZT4-7 12.7556 12.7556 12.7556 ZT8-11 9.07556 9.07556 9.07556 ZT12-15 0 0 0 ZT16-19 21.585 21.585 21.585 ZT20-23 27.158549999999998 27.158549999999998 27.158549999999998