condition mean min max ZT0-3 1.1157165 0.936263 1.2951700000000002 ZT4-7 1.0326505 1.0326505 1.0326505 ZT8-11 0.655613 0.655613 0.655613 ZT12-15 0 0 0 ZT16-19 0.6443185 0.6443185 0.6443185 ZT20-23 1.109021 1.109021 1.109021