condition mean min max ZT0-3 9255.849999999999 9255.849999999999 9255.849999999999 ZT4-7 8806.5 8806.5 8806.5 ZT8-11 8351.8 8351.8 8351.8 ZT12-15 7982.25 7982.25 7982.25 ZT16-19 8923.6 8923.6 8923.6 ZT20-23 10001.8 10001.8 10001.8