condition mean min max ZT0-3 45.99852925083333 44.89434862666666 47.102709875 ZT4-7 54.816879228333335 52.370367056666666 57.263391399999996 ZT8-11 64.77651823333333 58.65471150333333 70.89832496333334 ZT12-15 61.62357401 58.43927168 64.80787634 ZT16-19 46.889243414999996 45.84510459 47.93338224 ZT20-23 38.307310465 35.58304163 41.031579300000004