condition mean min max ZT0-3 0.093090875 0.0739176 0.11226415000000001 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0365318 0.0365318 0.0365318 ZT20-23 0.07465045000000001 0.07465045000000001 0.07465045000000001