condition mean min max ZT0-3 30.3909 30.3909 30.3909 ZT4-7 23.61525 23.61525 23.61525 ZT8-11 26.116349999999997 26.116349999999997 26.116349999999997 ZT12-15 27.9456 27.9456 27.9456 ZT16-19 51.00645 51.00645 51.00645 ZT20-23 29.620800000000003 29.620800000000003 29.620800000000003