condition mean min max ZT0-3 22.2122 22.2122 22.2122 ZT4-7 12.02288 12.02288 12.02288 ZT8-11 33.3891 33.3891 33.3891 ZT12-15 50.103899999999996 50.103899999999996 50.103899999999996 ZT16-19 18.796 18.796 18.796 ZT20-23 19.0839 19.0839 19.0839