condition mean min max ZT0-3 1.32049 1.32049 1.32049 ZT4-7 2.0402649999999998 2.0402649999999998 2.0402649999999998 ZT8-11 2.5892999999999997 2.5892999999999997 2.5892999999999997 ZT12-15 1.7052049999999999 1.7052049999999999 1.7052049999999999 ZT16-19 0.573626 0.573626 0.573626 ZT20-23 1.0386579999999999 1.0386579999999999 1.0386579999999999