condition mean min max ZT0-3 0.4016125 0.0 0.7757529999999999 ZT4-7 0.0 0.0 0.0 ZT8-11 0.564825 0.564825 0.564825 ZT12-15 0.204932 0.0 0.409864 ZT16-19 0.7434745 0.7434745 0.7434745 ZT20-23 0.3423075 0.3423075 0.3423075