condition mean min max ZT0-3 1.7176899999999997 1.30317 2.1322099999999997 ZT4-7 3.160955 3.160955 3.160955 ZT8-11 3.283515 3.283515 3.283515 ZT12-15 0 0 0 ZT16-19 0.772 0.772 0.772 ZT20-23 0.387722 0.387722 0.387722