condition mean min max ZT0-3 1.54016 0.0 2.999015 ZT4-7 0.0 0.0 0.0 ZT8-11 0.932895 0.932895 0.932895 ZT12-15 0.8242925 0.0 1.648585 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0