condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02646983333333333 0.02646983333333333 0.02646983333333333 ZT12-15 0.015117 0.0 0.030234 ZT16-19 0.0076592000000000006 0.0 0.015318400000000001 ZT20-23 0 0 0