condition mean min max ZT0-3 1937.82 1937.82 1937.82 ZT4-7 1843.9250000000002 1843.9250000000002 1843.9250000000002 ZT8-11 1447.75 1447.75 1447.75 ZT12-15 1104.95 1104.95 1104.95 ZT16-19 1085.983 1085.983 1085.983 ZT20-23 1687.575 1687.575 1687.575