condition mean min max ZT0-3 2084.013481 2084.013481 2084.013481 ZT4-7 1938.0228125 1938.0228125 1938.0228125 ZT8-11 2173.8472455 2173.8472455 2173.8472455 ZT12-15 2008.1647305000001 2008.1647305000001 2008.1647305000001 ZT16-19 2163.644708 2163.644708 2163.644708 ZT20-23 2272.4200625000003 2272.4200625000003 2272.4200625000003