condition mean min max ZT0-3 1621.65 1621.65 1621.65 ZT4-7 2172.9 2172.9 2172.9 ZT8-11 1961.95 1961.95 1961.95 ZT12-15 1605.6 1605.6 1605.6 ZT16-19 1317.3 1317.3 1317.3 ZT20-23 1300.85 1300.85 1300.85