condition mean min max ZT0-3 0.4277095 0.0 0.950564 ZT4-7 0.3143055 0.3143055 0.3143055 ZT8-11 0.0 0.0 0.0 ZT12-15 0.19144650000000002 0.170263 0.21263 ZT16-19 0.0 0.0 0.0 ZT20-23 0.489521 0.489521 0.489521