condition mean min max ZT0-3 0.14056033333333331 0.0 0.421681 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.447125 0.0 0.89425 ZT16-19 0.0 0.0 0.0 ZT20-23 0.440578 0.440578 0.440578