condition mean min max ZT0-3 9.240105 9.240105 9.240105 ZT4-7 11.2437 11.2437 11.2437 ZT8-11 4.929925000000001 4.929925000000001 4.929925000000001 ZT12-15 5.180895 5.180895 5.180895 ZT16-19 5.63585 5.63585 5.63585 ZT20-23 7.711494999999999 7.711494999999999 7.711494999999999