condition mean min max ZT0-3 29.5405 29.5405 29.5405 ZT4-7 14.16995 14.16995 14.16995 ZT8-11 24.87205 24.87205 24.87205 ZT12-15 42.760149999999996 42.760149999999996 42.760149999999996 ZT16-19 60.22855 60.22855 60.22855 ZT20-23 47.63535 47.63535 47.63535