condition mean min max ZT0-3 2.0892537795 1.746041796 2.432465763 ZT4-7 18.339601720250002 3.6423618204999997 33.036841620000004 ZT8-11 114.401646235 88.76757497 140.0357175 ZT12-15 156.98601524999998 148.6638875 165.308143 ZT16-19 81.7827204125 76.32267011 87.242770715 ZT20-23 71.5568965475 69.20777340000001 73.906019695