condition mean min max ZT0-3 0.810824 0.810824 0.810824 ZT4-7 0.255294 0.255294 0.255294 ZT8-11 0.0519615 0.0519615 0.0519615 ZT12-15 0.1793705 0.1793705 0.1793705 ZT16-19 0.3629485 0.3629485 0.3629485 ZT20-23 0.830473 0.830473 0.830473