condition mean min max ZT0-3 13.99992 13.99992 13.99992 ZT4-7 14.786310499999999 14.786310499999999 14.786310499999999 ZT8-11 15.431844 15.431844 15.431844 ZT12-15 13.751380000000001 13.751380000000001 13.751380000000001 ZT16-19 14.088878 14.088878 14.088878 ZT20-23 13.697223999999999 13.697223999999999 13.697223999999999