condition mean min max ZT0-3 0.18894049999999998 0.0 0.37788099999999997 ZT4-7 0.0979885 0.0979885 0.0979885 ZT8-11 0.679756 0.679756 0.679756 ZT12-15 0 0 0 ZT16-19 0.4729945 0.4729945 0.4729945 ZT20-23 0.0 0.0 0.0