condition mean min max ZT0-3 0.0142816 0.0 0.0285632 ZT4-7 0.0297919 0.0297919 0.0297919 ZT8-11 0.02892705 0.02892705 0.02892705 ZT12-15 0 0 0 ZT16-19 0.057659 0.057659 0.057659 ZT20-23 0.029039 0.029039 0.029039