condition mean min max ZT0-3 0.358909 0.23584499999999997 0.449742 ZT4-7 0.6058950000000001 0.6058950000000001 0.6058950000000001 ZT8-11 0.862126 0.862126 0.862126 ZT12-15 2.2543825 1.9622199999999999 2.546545 ZT16-19 1.907695 1.907695 1.907695 ZT20-23 0.8840285000000001 0.8840285000000001 0.8840285000000001