condition mean min max ZT0-3 25.108125 24.165399999999998 26.05085 ZT4-7 48.112049999999996 48.112049999999996 48.112049999999996 ZT8-11 34.1804 34.1804 34.1804 ZT12-15 0 0 0 ZT16-19 26.8401 26.8401 26.8401 ZT20-23 29.86825 29.86825 29.86825