condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0144345185 0.0 0.028869037 ZT16-19 0.012871024666666666 0.0 0.025742049333333333 ZT20-23 0.0 0.0 0.0