condition mean min max ZT0-3 182.220763 182.220763 182.220763 ZT4-7 163.64189349999998 163.64189349999998 163.64189349999998 ZT8-11 186.23399799999999 186.23399799999999 186.23399799999999 ZT12-15 205.408736 205.408736 205.408736 ZT16-19 202.9184105 202.9184105 202.9184105 ZT20-23 176.9130065 176.9130065 176.9130065