condition mean min max ZT0-3 0.4177893845 0.30888968400000005 0.526689085 ZT4-7 0.08077621675 0.072418406 0.0891340275 ZT8-11 0.135862409 0.06747808400000001 0.20424673399999999 ZT12-15 0.04587924225000001 0.044328676000000004 0.047429808500000004 ZT16-19 0.10296110725 0.0914050945 0.11451712 ZT20-23 0.13197217075 0.109206966 0.1547373755