condition mean min max ZT0-3 456.65000000000003 456.65000000000003 456.65000000000003 ZT4-7 390.9 390.9 390.9 ZT8-11 294.15 294.15 294.15 ZT12-15 287.95 287.95 287.95 ZT16-19 545.5 545.5 545.5 ZT20-23 581.05 581.05 581.05