condition mean min max ZT0-3 28.818283333333333 24.7884 31.9949 ZT4-7 28.863300000000002 28.863300000000002 28.863300000000002 ZT8-11 34.765950000000004 34.765950000000004 34.765950000000004 ZT12-15 43.7034 43.59205 43.814750000000004 ZT16-19 44.0006 44.0006 44.0006 ZT20-23 37.232150000000004 37.232150000000004 37.232150000000004