condition mean min max ZT0-3 0.50762475 0.46126871499999994 0.553980785 ZT4-7 0.2846242835 0.25133726700000003 0.3179113 ZT8-11 1.16907382075 0.823852604 1.5142950374999997 ZT12-15 1.0913926415 1.0792887795 1.1034965035 ZT16-19 1.1625834325 1.1261232635 1.1990436015000001 ZT20-23 1.25634653625 1.2543939425 1.25829913