condition mean min max ZT0-3 71.910225 64.2347 79.58575 ZT4-7 30.256050000000002 30.256050000000002 30.256050000000002 ZT8-11 26.213749999999997 26.213749999999997 26.213749999999997 ZT12-15 0 0 0 ZT16-19 62.3795 62.3795 62.3795 ZT20-23 42.999449999999996 42.999449999999996 42.999449999999996