condition mean min max ZT0-3 0.05486923333333333 0.039913 0.0818035 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.043248725 0.04101815 0.0454793 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0