condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.2477085 0.2477085 0.2477085 ZT8-11 1.759525 1.759525 1.759525 ZT12-15 0.9105592499999999 0.774851 1.0462675 ZT16-19 0.2343135 0.2343135 0.2343135 ZT20-23 0.264434 0.264434 0.264434