condition mean min max ZT0-3 0.48870025 0.28977050000000004 0.68763 ZT4-7 0.4935395 0.4935395 0.4935395 ZT8-11 0.541064 0.541064 0.541064 ZT12-15 0 0 0 ZT16-19 0.627304 0.627304 0.627304 ZT20-23 0.38868 0.38868 0.38868