condition mean min max ZT0-3 62.591167 62.591167 62.591167 ZT4-7 28.457019 28.457019 28.457019 ZT8-11 51.887816 51.887816 51.887816 ZT12-15 79.95000300000001 79.95000300000001 79.95000300000001 ZT16-19 291.4218105 291.4218105 291.4218105 ZT20-23 250.63453950000002 250.63453950000002 250.63453950000002