condition mean min max ZT0-3 15.730350000000001 15.730350000000001 15.730350000000001 ZT4-7 17.3127 17.3127 17.3127 ZT8-11 12.17775 12.17775 12.17775 ZT12-15 13.0091 13.0091 13.0091 ZT16-19 13.75715 13.75715 13.75715 ZT20-23 14.0749 14.0749 14.0749