condition mean min max ZT0-3 18.323700000000002 18.323700000000002 18.323700000000002 ZT4-7 12.4871 12.4871 12.4871 ZT8-11 9.964185 9.964185 9.964185 ZT12-15 10.153485 10.153485 10.153485 ZT16-19 19.523 19.523 19.523 ZT20-23 25.462699999999998 25.462699999999998 25.462699999999998