condition mean min max ZT0-3 0.4176475 0.264231 0.571064 ZT4-7 0.416265 0.416265 0.416265 ZT8-11 0.34627850000000004 0.34627850000000004 0.34627850000000004 ZT12-15 0 0 0 ZT16-19 0.52356 0.52356 0.52356 ZT20-23 0.5269585 0.5269585 0.5269585