condition mean min max ZT0-3 55.49361666666667 23.727449999999997 73.36449999999999 ZT4-7 16.70295 16.70295 16.70295 ZT8-11 16.609050000000003 16.609050000000003 16.609050000000003 ZT12-15 26.316249999999997 20.4618 32.1707 ZT16-19 38.42585 38.42585 38.42585 ZT20-23 64.71985000000001 64.71985000000001 64.71985000000001