condition mean min max ZT0-3 0.008936883333333333 0.0 0.02681065 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02584035 0.02584035 0.02584035 ZT12-15 0.039876999999999996 0.025858 0.053896 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0272434 0.0272434 0.0272434