condition mean min max ZT0-3 0.01249435 0.01249435 0.01249435 ZT4-7 0.0 0.0 0.0 ZT8-11 0.01886905 0.01886905 0.01886905 ZT12-15 0.01720685 0.01720685 0.01720685 ZT16-19 0.12053454999999999 0.12053454999999999 0.12053454999999999 ZT20-23 0.0597635 0.0597635 0.0597635