condition mean min max ZT0-3 34.748236542499995 33.14922759 36.347245494999996 ZT4-7 27.108930548333333 26.159612526666667 28.05824857 ZT8-11 41.07036617 36.96233367 45.17839867 ZT12-15 29.227873504999998 28.61363338 29.84211363 ZT16-19 35.139820648333334 33.239770236666665 37.03987106 ZT20-23 29.599792411666666 28.697658429999997 30.501926393333335