condition mean min max ZT0-3 0.52353925 0.1464745 0.900604 ZT4-7 2.707095 2.707095 2.707095 ZT8-11 2.9530849999999997 2.9530849999999997 2.9530849999999997 ZT12-15 0 0 0 ZT16-19 0.7875095 0.7875095 0.7875095 ZT20-23 0.19772250000000002 0.19772250000000002 0.19772250000000002