condition mean min max ZT0-3 2127.018293 2127.018293 2127.018293 ZT4-7 2153.7281235 2153.7281235 2153.7281235 ZT8-11 2081.9926185 2081.9926185 2081.9926185 ZT12-15 3311.6148350000003 3311.6148350000003 3311.6148350000003 ZT16-19 2836.4599835 2836.4599835 2836.4599835 ZT20-23 3789.198795 3789.198795 3789.198795