condition mean min max ZT0-3 1033.90262 1033.90262 1033.90262 ZT4-7 1693.799362 1693.799362 1693.799362 ZT8-11 1636.681635 1636.681635 1636.681635 ZT12-15 1377.616672 1377.616672 1377.616672 ZT16-19 795.9184055000001 795.9184055000001 795.9184055000001 ZT20-23 693.882742 693.882742 693.882742