condition mean min max ZT0-3 28.155875 25.7833 30.52845 ZT4-7 17.4242 17.4242 17.4242 ZT8-11 38.5792 38.5792 38.5792 ZT12-15 0 0 0 ZT16-19 41.1627 41.1627 41.1627 ZT20-23 37.978300000000004 37.978300000000004 37.978300000000004