condition mean min max ZT0-3 0.0308608775 0.020609902 0.041111853000000004 ZT4-7 0.2033797995 0.018898997 0.387860602 ZT8-11 3.30726069575 2.0022466865 4.612274705 ZT12-15 5.78750551275 4.527754625 7.0472564005 ZT16-19 1.8114353539999999 1.303889119 2.318981589 ZT20-23 0.6006852445 0.5810812430000001 0.620289246