condition mean min max ZT0-3 0.4414275 0.4414275 0.4414275 ZT4-7 0.4164595 0.4164595 0.4164595 ZT8-11 0.5911365 0.5911365 0.5911365 ZT12-15 0.5811850000000001 0.5811850000000001 0.5811850000000001 ZT16-19 0.698345 0.698345 0.698345 ZT20-23 0.4643005 0.4643005 0.4643005