condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0248507 0.0248507 0.0248507 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.035307 0.035307 0.035307 ZT20-23 0.0 0.0 0.0