condition mean min max ZT0-3 0.0433586 0.02129205 0.06542515 ZT4-7 0.3244925 0.3244925 0.3244925 ZT8-11 0.629274 0.629274 0.629274 ZT12-15 0 0 0 ZT16-19 0.4075575 0.4075575 0.4075575 ZT20-23 0.3667275 0.3667275 0.3667275