condition mean min max ZT0-3 2.9300625 2.552645 3.30748 ZT4-7 2.246105 2.246105 2.246105 ZT8-11 2.34169 2.34169 2.34169 ZT12-15 0 0 0 ZT16-19 8.178 8.178 8.178 ZT20-23 3.77543 3.77543 3.77543