condition mean min max ZT0-3 0.6286210105000001 0.493191722 0.7640502990000001 ZT4-7 0.3965929725 0.3228005235 0.47038542149999996 ZT8-11 0.42608126825 0.40825106349999996 0.443911473 ZT12-15 0.2102926765 0.063945537 0.356639816 ZT16-19 0.14290823525000002 0.128447299 0.15736917150000002 ZT20-23 0.363130883 0.29427462400000004 0.431987142