condition mean min max ZT0-3 0.685104 0.0 1.235065 ZT4-7 0.0 0.0 0.0 ZT8-11 0.805985 0.805985 0.805985 ZT12-15 0.42085675 0.0 0.8417135 ZT16-19 0.3764795 0.3764795 0.3764795 ZT20-23 2.564953 2.564953 2.564953