condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.048886806500000005 0.0 0.09777361300000001 ZT8-11 0.16988938325 0.0494636925 0.290315074 ZT12-15 0.41578843099999996 0.3933061125 0.43827074949999995 ZT16-19 0.21655994775 0.162923033 0.2701968625 ZT20-23 0.11041258450000001 0.0460940235 0.17473114550000002