condition mean min max ZT0-3 573.2 573.2 573.2 ZT4-7 656.4 656.4 656.4 ZT8-11 641.9000000000001 641.9000000000001 641.9000000000001 ZT12-15 556.4 556.4 556.4 ZT16-19 556.35 556.35 556.35 ZT20-23 545.15 545.15 545.15