condition mean min max ZT0-3 7.2943074999999995 7.284079999999999 7.304535 ZT4-7 5.7722 5.7722 5.7722 ZT8-11 13.95645 13.95645 13.95645 ZT12-15 0 0 0 ZT16-19 13.2102 13.2102 13.2102 ZT20-23 10.243775 10.243775 10.243775