condition mean min max ZT0-3 0.31106849999999997 0.20967550000000001 0.4124615 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.274408 0.274408 0.274408 ZT20-23 0.1387475 0.1387475 0.1387475