condition mean min max ZT0-3 45.055725 43.5904 46.52105 ZT4-7 40.764250000000004 40.764250000000004 40.764250000000004 ZT8-11 44.829350000000005 44.829350000000005 44.829350000000005 ZT12-15 0 0 0 ZT16-19 52.847899999999996 52.847899999999996 52.847899999999996 ZT20-23 57.78805 57.78805 57.78805