condition mean min max ZT0-3 0.4992328333333333 0.0 0.7494649999999999 ZT4-7 0.0805055 0.0805055 0.0805055 ZT8-11 1.313947 1.313947 1.313947 ZT12-15 1.14740175 1.1264045 1.168399 ZT16-19 0.3249105 0.3249105 0.3249105 ZT20-23 1.7633100000000002 1.7633100000000002 1.7633100000000002