condition mean min max ZT0-3 37.26349999999999 37.26349999999999 37.26349999999999 ZT4-7 7.76091 7.76091 7.76091 ZT8-11 2.963455 2.963455 2.963455 ZT12-15 251.638 251.638 251.638 ZT16-19 518.1565 518.1565 518.1565 ZT20-23 226.29 226.29 226.29