condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.312599 0.312599 0.312599 ZT8-11 0.3136775 0.3136775 0.3136775 ZT12-15 0 0 0 ZT16-19 0.6240075 0.6240075 0.6240075 ZT20-23 0.31226 0.31226 0.31226