condition mean min max ZT0-3 1.0717401342500001 0.85886949 1.2846107785000003 ZT4-7 0.783075976 0.5414034270000001 1.024748525 ZT8-11 1.683517095 1.3446325055 2.0224016845 ZT12-15 3.2730931634999996 2.9068709134999997 3.6393154135 ZT16-19 2.75545296525 2.7151629225000002 2.7957430079999996 ZT20-23 4.1940462385 3.5515171155000003 4.8365753615