condition mean min max ZT0-3 0.22945483333333333 0.0610605 0.337029 ZT4-7 0.771279 0.771279 0.771279 ZT8-11 1.7183065000000002 1.7183065000000002 1.7183065000000002 ZT12-15 0.97593425 0.2504685 1.7014 ZT16-19 0.1238085 0.1238085 0.1238085 ZT20-23 0.0589925 0.0589925 0.0589925