condition mean min max ZT0-3 40.778018 40.778018 40.778018 ZT4-7 27.1810525 27.1810525 27.1810525 ZT8-11 32.8658125 32.8658125 32.8658125 ZT12-15 108.9474815 108.9474815 108.9474815 ZT16-19 112.29458149999999 112.29458149999999 112.29458149999999 ZT20-23 334.30360199999996 334.30360199999996 334.30360199999996