condition mean min max ZT0-3 44.723387 44.723387 44.723387 ZT4-7 38.409436 38.409436 38.409436 ZT8-11 37.716525000000004 37.716525000000004 37.716525000000004 ZT12-15 45.154008000000005 45.154008000000005 45.154008000000005 ZT16-19 45.6576785 45.6576785 45.6576785 ZT20-23 43.7271645 43.7271645 43.7271645