condition mean min max ZT0-3 1.80133 1.5394800000000002 2.06318 ZT4-7 1.20304 1.20304 1.20304 ZT8-11 2.830945 2.830945 2.830945 ZT12-15 0 0 0 ZT16-19 3.21204 3.21204 3.21204 ZT20-23 1.0456175 1.0456175 1.0456175