condition mean min max ZT0-3 10.19866 10.19866 10.19866 ZT4-7 9.8909555 9.8909555 9.8909555 ZT8-11 9.8570495 9.8570495 9.8570495 ZT12-15 10.304078 10.304078 10.304078 ZT16-19 10.559222 10.559222 10.559222 ZT20-23 10.216045000000001 10.216045000000001 10.216045000000001