condition mean min max ZT0-3 1706.910026 1706.910026 1706.910026 ZT4-7 1547.2497365 1547.2497365 1547.2497365 ZT8-11 1578.4593304999999 1578.4593304999999 1578.4593304999999 ZT12-15 1954.6324840000002 1954.6324840000002 1954.6324840000002 ZT16-19 1779.7274275 1779.7274275 1779.7274275 ZT20-23 2533.9745679999996 2533.9745679999996 2533.9745679999996