condition mean min max ZT0-3 43.4842 43.4842 43.4842 ZT4-7 39.81765 39.81765 39.81765 ZT8-11 31.70675 31.70675 31.70675 ZT12-15 31.40535 31.40535 31.40535 ZT16-19 36.9049 36.9049 36.9049 ZT20-23 44.3441 44.3441 44.3441