condition mean min max ZT0-3 0.3031935 0.3004785 0.3059085 ZT4-7 0.33292649999999996 0.33292649999999996 0.33292649999999996 ZT8-11 0.2816735 0.2816735 0.2816735 ZT12-15 0 0 0 ZT16-19 0.34691700000000003 0.34691700000000003 0.34691700000000003 ZT20-23 1.021446 1.021446 1.021446