condition mean min max ZT0-3 1616.85 1616.85 1616.85 ZT4-7 1198.6 1198.6 1198.6 ZT8-11 2027.95 2027.95 2027.95 ZT12-15 2341.7 2341.7 2341.7 ZT16-19 2341.7 2341.7 2341.7 ZT20-23 2181.9 2181.9 2181.9