condition mean min max ZT0-3 1.8853 1.8853 1.8853 ZT4-7 1.5632565 1.5632565 1.5632565 ZT8-11 1.868245 1.868245 1.868245 ZT12-15 3.5314 3.5314 3.5314 ZT16-19 4.33958 4.33958 4.33958 ZT20-23 3.1343449999999997 3.1343449999999997 3.1343449999999997