condition mean min max ZT0-3 1.7746537500000001 1.0454825 2.503825 ZT4-7 13.44125 13.44125 13.44125 ZT8-11 8.862745 8.862745 8.862745 ZT12-15 0 0 0 ZT16-19 1.0286465 1.0286465 1.0286465 ZT20-23 1.18052 1.18052 1.18052