condition mean min max ZT0-3 1742.75 1742.75 1742.75 ZT4-7 914.8 914.8 914.8 ZT8-11 1004.9499999999999 1004.9499999999999 1004.9499999999999 ZT12-15 1297.05 1297.05 1297.05 ZT16-19 1716.65 1716.65 1716.65 ZT20-23 2237.3999999999996 2237.3999999999996 2237.3999999999996