condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.032868643 0.0 0.065737286 ZT8-11 0.020307936 0.0 0.040615872 ZT12-15 0.0 0.0 0.0 ZT16-19 0.05713214899999999 0.0 0.11426429799999999 ZT20-23 0.0577098805 0.016426154000000002 0.098993607