condition mean min max ZT0-3 30.901850000000003 28.054000000000002 33.749700000000004 ZT4-7 14.122499999999999 14.122499999999999 14.122499999999999 ZT8-11 12.2102 12.2102 12.2102 ZT12-15 0 0 0 ZT16-19 23.9025 23.9025 23.9025 ZT20-23 25.4914 25.4914 25.4914