condition mean min max ZT0-3 53.854517 53.854517 53.854517 ZT4-7 67.830164 67.830164 67.830164 ZT8-11 76.4863945 76.4863945 76.4863945 ZT12-15 66.0371175 66.0371175 66.0371175 ZT16-19 84.61309299999999 84.61309299999999 84.61309299999999 ZT20-23 82.3104665 82.3104665 82.3104665