condition mean min max ZT0-3 0.27346950000000003 0.27346950000000003 0.27346950000000003 ZT4-7 0.4480035 0.4480035 0.4480035 ZT8-11 0.17619869999999999 0.17619869999999999 0.17619869999999999 ZT12-15 0.1996475 0.1996475 0.1996475 ZT16-19 0.5675085 0.5675085 0.5675085 ZT20-23 0.43549899999999997 0.43549899999999997 0.43549899999999997