condition mean min max ZT0-3 27.4564641525 27.400382585 27.512545720000002 ZT4-7 25.51297927 24.15137381 26.87458473 ZT8-11 36.74658903666666 33.52510333666667 39.968074736666665 ZT12-15 35.681667275 32.799806770000004 38.56352778 ZT16-19 36.220823546666665 34.26745442 38.17419267333333 ZT20-23 28.0289574 24.57734841 31.48056639