condition mean min max ZT0-3 0.0206636 0.0206636 0.0206636 ZT4-7 0.0901325 0.0901325 0.0901325 ZT8-11 0.000130914 0.000130914 0.000130914 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0245984 0.0245984 0.0245984