condition mean min max ZT0-3 229.924364 229.924364 229.924364 ZT4-7 518.6726395000001 518.6726395000001 518.6726395000001 ZT8-11 360.481267 360.481267 360.481267 ZT12-15 327.4294 327.4294 327.4294 ZT16-19 138.7749695 138.7749695 138.7749695 ZT20-23 97.0078035 97.0078035 97.0078035