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 1.4656275 0.0 2.931255 ZT16-19 1.04919 0.0 2.09838 ZT20-23 0 0 0