condition mean min max ZT0-3 0.012744675 0.0 0.02548935 ZT4-7 0.0 0.0 0.0 ZT8-11 0.077701 0.077701 0.077701 ZT12-15 0 0 0 ZT16-19 0.17502295 0.17502295 0.17502295 ZT20-23 0.125929 0.125929 0.125929