condition mean min max ZT0-3 0.36056075 0.20266299999999998 0.5184584999999999 ZT4-7 0.1992125 0.1992125 0.1992125 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.08242055000000001 0.08242055000000001 0.08242055000000001 ZT20-23 0.35697599999999996 0.35697599999999996 0.35697599999999996