condition mean min max ZT0-3 148.5475287 114.23818349999999 182.8568739 ZT4-7 148.7875997 143.81662419999998 153.75857520000002 ZT8-11 149.96487195 132.75617245 167.17357145 ZT12-15 70.0515297975 37.878936345 102.22412324999999 ZT16-19 53.71006952 52.048181729999996 55.37195731 ZT20-23 48.807507445 45.207008765 52.408006125