condition mean min max ZT0-3 0.4224651666666667 0.0 1.2673955000000001 ZT4-7 0.0 0.0 0.0 ZT8-11 2.006065 2.006065 2.006065 ZT12-15 0.3909675 0.0 0.781935 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0