condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0119285365 0.0090914625 0.0147656105 ZT8-11 0.009920548 0.0028883909999999997 0.016952705 ZT12-15 0.02690285475 0.0232265705 0.030579138999999998 ZT16-19 0.0195464995 0.0153086145 0.023784384500000002 ZT20-23 0.021353749999999998 0.020406557 0.022300943