condition mean min max ZT0-3 0.92603885 0.0394777 1.8126 ZT4-7 7.72694 7.72694 7.72694 ZT8-11 1.459785 1.459785 1.459785 ZT12-15 0 0 0 ZT16-19 1.51579 1.51579 1.51579 ZT20-23 3.2392149999999997 3.2392149999999997 3.2392149999999997