condition mean min max ZT0-3 1.68469 1.4986350000000002 1.8707449999999999 ZT4-7 2.24035 2.24035 2.24035 ZT8-11 1.32148 1.32148 1.32148 ZT12-15 0 0 0 ZT16-19 1.708845 1.708845 1.708845 ZT20-23 2.003425 2.003425 2.003425