condition mean min max ZT0-3 1.1234747500000002 1.0222055 1.224744 ZT4-7 1.380345 1.380345 1.380345 ZT8-11 0.7277534999999999 0.7277534999999999 0.7277534999999999 ZT12-15 0 0 0 ZT16-19 1.16693 1.16693 1.16693 ZT20-23 1.58918 1.58918 1.58918