condition mean min max ZT0-3 0.0974245 0.0 0.194849 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1930325 0.1930325 0.1930325 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.3851295 0.3851295 0.3851295