condition mean min max ZT0-3 35.30785 35.30785 35.30785 ZT4-7 34.6204 34.6204 34.6204 ZT8-11 37.4702 37.4702 37.4702 ZT12-15 30.160899999999998 30.160899999999998 30.160899999999998 ZT16-19 35.4594 35.4594 35.4594 ZT20-23 41.31615 41.31615 41.31615