condition mean min max ZT0-3 0.060909622000000004 0.0 0.12181924400000001 ZT4-7 0.0 0.0 0.0 ZT8-11 0.09809935225 0.0932334675 0.10296523699999999 ZT12-15 0.15091992975000001 0.13799664 0.1638432195 ZT16-19 0.08203118425 0.040002774500000005 0.124059594 ZT20-23 0.15314688875 0.09383757150000001 0.21245620599999998