condition mean min max ZT0-3 27.247911414999997 24.05170561 30.44411722 ZT4-7 39.8301872675 38.714934105 40.945440430000005 ZT8-11 46.877431575 41.800778545 51.954084605000006 ZT12-15 71.687849325 67.607508135 75.768190515 ZT16-19 86.3046379975 79.95695596499999 92.65232003 ZT20-23 91.396997975 89.09554034 93.69845561