condition mean min max ZT0-3 9.404861 9.404861 9.404861 ZT4-7 9.392925 9.392925 9.392925 ZT8-11 8.678218000000001 8.678218000000001 8.678218000000001 ZT12-15 9.48184 9.48184 9.48184 ZT16-19 10.53825 10.53825 10.53825 ZT20-23 9.170512500000001 9.170512500000001 9.170512500000001