condition mean min max ZT0-3 1840.5500000000002 1840.5500000000002 1840.5500000000002 ZT4-7 1840.6 1840.6 1840.6 ZT8-11 1714.05 1714.05 1714.05 ZT12-15 1352.2 1352.2 1352.2 ZT16-19 1564.65 1564.65 1564.65 ZT20-23 1779.5 1779.5 1779.5