condition mean min max ZT0-3 0.12826904475 0.0371515185 0.219386571 ZT4-7 0.028248361250000003 0.026331628500000002 0.030165094000000003 ZT8-11 0.4387936865 0.2229083775 0.6546789955 ZT12-15 0.8681396610000001 0.8115072130000001 0.924772109 ZT16-19 0.47495368425 0.41279578800000005 0.5371115805 ZT20-23 0.382845198 0.3539416715 0.4117487245