condition mean min max ZT0-3 0.08791498333333334 0.059973200000000004 0.1224865 ZT4-7 0.0 0.0 0.0 ZT8-11 0.05946675 0.05946675 0.05946675 ZT12-15 0.031830125 0.0197855 0.04387475 ZT16-19 0.09445200000000001 0.09445200000000001 0.09445200000000001 ZT20-23 0.0216161 0.0216161 0.0216161