condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0109758845 0.0 0.021951769 ZT12-15 0.012408810499999999 0.0 0.024817620999999998 ZT16-19 0.019800465333333336 0.017812624000000003 0.02178830666666667 ZT20-23 0.010701218 0.0 0.021402436