condition mean min max ZT0-3 16.115782666666664 1.40389 45.241749999999996 ZT4-7 126.96449999999999 126.96449999999999 126.96449999999999 ZT8-11 60.1033 60.1033 60.1033 ZT12-15 23.404899999999998 12.6507 34.159099999999995 ZT16-19 5.59894 5.59894 5.59894 ZT20-23 2.208455 2.208455 2.208455