condition mean min max ZT0-3 175.58403435250003 45.712025905000004 305.45604280000003 ZT4-7 8.969060231250001 8.0033182425 9.93480222 ZT8-11 7.1779805525 6.869320006000001 7.486641099 ZT12-15 7.3557455735 6.7357702795000005 7.9757208675 ZT16-19 6.315438460249999 4.995633621 7.635243299499999 ZT20-23 11.350805305 10.235336844999999 12.466273765