condition mean min max ZT0-3 33.0488588125 27.5333441 38.564373525 ZT4-7 73.64697475 70.03106271 77.26288679000001 ZT8-11 127.06945412750001 107.702114155 146.43679410000001 ZT12-15 86.48245908749999 62.13369726 110.83122091499999 ZT16-19 41.630848485 33.744111325 49.517585645 ZT20-23 19.606586397500003 16.55828908 22.654883715