condition mean min max ZT0-3 35.32695 35.32695 35.32695 ZT4-7 25.827399999999997 25.827399999999997 25.827399999999997 ZT8-11 42.077349999999996 42.077349999999996 42.077349999999996 ZT12-15 38.86795 38.86795 38.86795 ZT16-19 59.26625 59.26625 59.26625 ZT20-23 42.655 42.655 42.655