condition mean min max ZT0-3 15.720200308416668 9.4858663735 21.954534243333335 ZT4-7 44.27605410333334 36.2121327 52.33997550666667 ZT8-11 56.826464720000004 52.98786919 60.66506025 ZT12-15 85.01101690833333 74.59097574333333 95.43105807333333 ZT16-19 73.9607487 70.74209461999999 77.17940278 ZT20-23 65.54219492 51.65266041666666 79.43172942333334