condition mean min max ZT0-3 0.3886718333333333 0.0 1.0688665 ZT4-7 1.75529 1.75529 1.75529 ZT8-11 1.5421334999999998 1.5421334999999998 1.5421334999999998 ZT12-15 0.09999925 0.0 0.1999985 ZT16-19 0.3968235 0.3968235 0.3968235 ZT20-23 0.0235278 0.0235278 0.0235278