condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.042103656999999996 0.0 0.08420731399999999 ZT12-15 0.0 0.0 0.0 ZT16-19 0.04075238016666667 0.0 0.08150476033333334 ZT20-23 0.0 0.0 0.0