condition mean min max ZT0-3 0.186954 0.0 0.373908 ZT4-7 0.0 0.0 0.0 ZT8-11 0.376604 0.376604 0.376604 ZT12-15 0 0 0 ZT16-19 0.122746 0.122746 0.122746 ZT20-23 0.0 0.0 0.0