condition mean min max ZT0-3 0.19513199999999997 0.157604 0.23265999999999998 ZT4-7 1.7586585 1.7586585 1.7586585 ZT8-11 0.7039155 0.7039155 0.7039155 ZT12-15 0 0 0 ZT16-19 0.6986825 0.6986825 0.6986825 ZT20-23 0.8582909999999999 0.8582909999999999 0.8582909999999999