condition mean min max ZT0-3 7.921175 5.148275 10.694075 ZT4-7 9.165690000000001 9.165690000000001 9.165690000000001 ZT8-11 6.300835 6.300835 6.300835 ZT12-15 0 0 0 ZT16-19 13.7118 13.7118 13.7118 ZT20-23 15.64535 15.64535 15.64535