condition mean min max ZT0-3 1578.75 1578.75 1578.75 ZT4-7 2053.6 2053.6 2053.6 ZT8-11 2235.55 2235.55 2235.55 ZT12-15 2011.4 2011.4 2011.4 ZT16-19 1322.5 1322.5 1322.5 ZT20-23 1230.5 1230.5 1230.5