condition mean min max ZT0-3 1.140231 0.8027735 1.79841 ZT4-7 0.7779699999999999 0.7779699999999999 0.7779699999999999 ZT8-11 0.79888 0.79888 0.79888 ZT12-15 1.78640125 1.4836425 2.08916 ZT16-19 1.88744 1.88744 1.88744 ZT20-23 1.7036099999999998 1.7036099999999998 1.7036099999999998