condition mean min max ZT0-3 11748.75976 11748.75976 11748.75976 ZT4-7 12261.5452 12261.5452 12261.5452 ZT8-11 12172.1924 12172.1924 12172.1924 ZT12-15 11783.877768499999 11783.877768499999 11783.877768499999 ZT16-19 9221.1909935 9221.1909935 9221.1909935 ZT20-23 8039.1568449999995 8039.1568449999995 8039.1568449999995