condition mean min max ZT0-3 24.690858 24.690858 24.690858 ZT4-7 56.443402000000006 56.443402000000006 56.443402000000006 ZT8-11 57.166558 57.166558 57.166558 ZT12-15 61.499516 61.499516 61.499516 ZT16-19 42.3732325 42.3732325 42.3732325 ZT20-23 44.302679499999996 44.302679499999996 44.302679499999996