condition mean min max ZT0-3 32.861266666666666 27.5941 37.225300000000004 ZT4-7 28.66285 28.66285 28.66285 ZT8-11 27.26625 27.26625 27.26625 ZT12-15 29.9526 28.24205 31.66315 ZT16-19 34.47905 34.47905 34.47905 ZT20-23 43.8369 43.8369 43.8369