condition mean min max ZT0-3 823.22711 823.22711 823.22711 ZT4-7 976.688715 976.688715 976.688715 ZT8-11 789.5224925 789.5224925 789.5224925 ZT12-15 679.923501 679.923501 679.923501 ZT16-19 738.747645 738.747645 738.747645 ZT20-23 908.578211 908.578211 908.578211