condition mean min max ZT0-3 0.08579106666666667 0.0511875 0.10477515 ZT4-7 0.02350255 0.02350255 0.02350255 ZT8-11 0.1234314 0.1234314 0.1234314 ZT12-15 0.60096625 0.429104 0.7728285 ZT16-19 0.4465635 0.4465635 0.4465635 ZT20-23 0.1309956 0.1309956 0.1309956