condition mean min max ZT0-3 0.181732 0.17111549999999998 0.1923485 ZT4-7 0.193982 0.193982 0.193982 ZT8-11 0.5793874999999999 0.5793874999999999 0.5793874999999999 ZT12-15 0 0 0 ZT16-19 0.5105325000000001 0.5105325000000001 0.5105325000000001 ZT20-23 0.3419255 0.3419255 0.3419255