condition mean min max ZT0-3 42.6068 42.6068 42.6068 ZT4-7 35.7292 35.7292 35.7292 ZT8-11 27.078000000000003 27.078000000000003 27.078000000000003 ZT12-15 32.29115 32.29115 32.29115 ZT16-19 40.423700000000004 40.423700000000004 40.423700000000004 ZT20-23 37.82 37.82 37.82