condition mean min max ZT0-3 1817.575838 1817.575838 1817.575838 ZT4-7 705.0787795000001 705.0787795000001 705.0787795000001 ZT8-11 794.427598 794.427598 794.427598 ZT12-15 1045.3964230000001 1045.3964230000001 1045.3964230000001 ZT16-19 1257.9071920000001 1257.9071920000001 1257.9071920000001 ZT20-23 1017.5222014999999 1017.5222014999999 1017.5222014999999