condition mean min max ZT0-3 35.372479 35.372479 35.372479 ZT4-7 44.924147500000004 44.924147500000004 44.924147500000004 ZT8-11 37.628902499999995 37.628902499999995 37.628902499999995 ZT12-15 35.141537 35.141537 35.141537 ZT16-19 54.503526 54.503526 54.503526 ZT20-23 73.4756525 73.4756525 73.4756525