condition mean min max ZT0-3 0.3651455 0.160579 0.569712 ZT4-7 0.38591549999999997 0.38591549999999997 0.38591549999999997 ZT8-11 1.056585 1.056585 1.056585 ZT12-15 0 0 0 ZT16-19 1.42085 1.42085 1.42085 ZT20-23 0.699112 0.699112 0.699112