condition mean min max ZT0-3 10.207510000000001 10.207510000000001 10.207510000000001 ZT4-7 9.98284 9.98284 9.98284 ZT8-11 9.364645 9.364645 9.364645 ZT12-15 9.99477 9.99477 9.99477 ZT16-19 11.8988 11.8988 11.8988 ZT20-23 11.613 11.613 11.613