condition mean min max ZT0-3 1.2270466666666666 0.0 2.583155 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 2.1189704750000002 2.08616095 2.15178 ZT16-19 0.0 0.0 0.0 ZT20-23 3.46637 3.46637 3.46637