condition mean min max ZT0-3 11.0043 11.0043 11.0043 ZT4-7 8.243795 8.243795 8.243795 ZT8-11 8.7821 8.7821 8.7821 ZT12-15 8.580684999999999 8.580684999999999 8.580684999999999 ZT16-19 12.1817 12.1817 12.1817 ZT20-23 11.175650000000001 11.175650000000001 11.175650000000001