condition mean min max ZT0-3 5.54753 5.48637 5.60869 ZT4-7 3.319145 3.319145 3.319145 ZT8-11 1.498175 1.498175 1.498175 ZT12-15 0 0 0 ZT16-19 0.986779 0.986779 0.986779 ZT20-23 3.005385 3.005385 3.005385