condition mean min max ZT0-3 99.924371 99.924371 99.924371 ZT4-7 47.611264 47.611264 47.611264 ZT8-11 56.3754555 56.3754555 56.3754555 ZT12-15 62.5744425 62.5744425 62.5744425 ZT16-19 113.94574399999999 113.94574399999999 113.94574399999999 ZT20-23 105.70478800000001 105.70478800000001 105.70478800000001