condition mean min max ZT0-3 0.9949635 0.9949635 0.9949635 ZT4-7 0.6072355 0.6072355 0.6072355 ZT8-11 0.39601949999999997 0.39601949999999997 0.39601949999999997 ZT12-15 0.51145 0.51145 0.51145 ZT16-19 0.5844419999999999 0.5844419999999999 0.5844419999999999 ZT20-23 0.907924 0.907924 0.907924