condition mean min max ZT0-3 2237.25 2237.25 2237.25 ZT4-7 1511.5 1511.5 1511.5 ZT8-11 1232.5500000000002 1232.5500000000002 1232.5500000000002 ZT12-15 1261.2 1261.2 1261.2 ZT16-19 1770.85 1770.85 1770.85 ZT20-23 2095.85 2095.85 2095.85