condition mean min max ZT0-3 14.7914 14.7914 14.7914 ZT4-7 14.91925 14.91925 14.91925 ZT8-11 12.3831 12.3831 12.3831 ZT12-15 11.4118 11.4118 11.4118 ZT16-19 14.44255 14.44255 14.44255 ZT20-23 14.8637 14.8637 14.8637