condition mean min max ZT0-3 0.5891133333333333 0.0 1.76734 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 1.70454 0.0 3.40908 ZT16-19 3.30301 3.30301 3.30301 ZT20-23 3.59175 3.59175 3.59175