condition mean min max ZT0-3 87.4541 83.21965 91.68854999999999 ZT4-7 46.0633 46.0633 46.0633 ZT8-11 28.42035 28.42035 28.42035 ZT12-15 0 0 0 ZT16-19 61.635099999999994 61.635099999999994 61.635099999999994 ZT20-23 71.7437 71.7437 71.7437