condition mean min max ZT0-3 0.09418915 0.09418915 0.09418915 ZT4-7 0.06820735 0.06820735 0.06820735 ZT8-11 0.364089 0.364089 0.364089 ZT12-15 0.38941000000000003 0.38941000000000003 0.38941000000000003 ZT16-19 0.298569 0.298569 0.298569 ZT20-23 0.0786883 0.0786883 0.0786883