condition mean min max ZT0-3 41.717016 41.717016 41.717016 ZT4-7 39.762899000000004 39.762899000000004 39.762899000000004 ZT8-11 53.389629 53.389629 53.389629 ZT12-15 50.928185 50.928185 50.928185 ZT16-19 56.2731765 56.2731765 56.2731765 ZT20-23 49.7369255 49.7369255 49.7369255