condition mean min max ZT0-3 41.667449999999995 41.021649999999994 42.0687 ZT4-7 67.73294999999999 67.73294999999999 67.73294999999999 ZT8-11 62.40814999999999 62.40814999999999 62.40814999999999 ZT12-15 66.624975 38.903800000000004 94.34615 ZT16-19 38.17885 38.17885 38.17885 ZT20-23 41.25075 41.25075 41.25075