condition mean min max ZT0-3 2292.69 1989.675 2595.705 ZT4-7 1786.0149999999999 1786.0149999999999 1786.0149999999999 ZT8-11 813.6020000000001 813.6020000000001 813.6020000000001 ZT12-15 0 0 0 ZT16-19 1702.755 1702.755 1702.755 ZT20-23 1164.725 1164.725 1164.725