condition mean min max ZT0-3 0.7388462499999999 0.5457145 0.931978 ZT4-7 1.1015549999999998 1.1015549999999998 1.1015549999999998 ZT8-11 0.94438 0.94438 0.94438 ZT12-15 0 0 0 ZT16-19 0.458329 0.458329 0.458329 ZT20-23 0.8381265 0.8381265 0.8381265