condition mean min max ZT0-3 1341.25 1341.25 1341.25 ZT4-7 1799.9 1799.9 1799.9 ZT8-11 2134.95 2134.95 2134.95 ZT12-15 2300.85 2300.85 2300.85 ZT16-19 1749.9 1749.9 1749.9 ZT20-23 1537.3 1537.3 1537.3