condition mean min max ZT0-3 24.289450000000002 24.289450000000002 24.289450000000002 ZT4-7 15.11995 15.11995 15.11995 ZT8-11 14.1421 14.1421 14.1421 ZT12-15 14.77715 14.77715 14.77715 ZT16-19 22.57555 22.57555 22.57555 ZT20-23 24.382849999999998 24.382849999999998 24.382849999999998