condition mean min max ZT0-3 70.65981464250001 67.29847387000001 74.021155415 ZT4-7 67.35111111166667 67.08305839333333 67.61916383 ZT8-11 69.57139887333334 67.13046527 72.01233247666667 ZT12-15 73.28478892833334 70.06292005666667 76.5066578 ZT16-19 84.01463615833333 84.0071482 84.02212411666666 ZT20-23 94.03958112166667 91.93619374000001 96.14296850333334