condition mean min max ZT0-3 0.17514092625000002 0.0886207915 0.26166106100000003 ZT4-7 0.24884658025 0.09924187000000001 0.3984512905 ZT8-11 2.007863987 0.9798637934999999 3.0358641805 ZT12-15 4.601678780249999 4.269122886 4.9342346745 ZT16-19 2.1601174185 1.706775708 2.613459129 ZT20-23 1.578959049 1.480183631 1.677734467