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 0.006958275 0.0 0.01391655 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01348575 0.01348575 0.01348575