condition mean min max ZT0-3 17.661450000000002 17.661450000000002 17.661450000000002 ZT4-7 16.2014 16.2014 16.2014 ZT8-11 12.8077 12.8077 12.8077 ZT12-15 14.61945 14.61945 14.61945 ZT16-19 17.1658 17.1658 17.1658 ZT20-23 16.4521 16.4521 16.4521