condition mean min max ZT0-3 0.24427817791666667 0.14157976949999998 0.34697658633333334 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.08338454700000002 0.0 0.16676909400000003 ZT16-19 0.030269258000000004 0.0 0.06053851600000001 ZT20-23 0.030893242833333334 0.0 0.06178648566666667