condition mean min max ZT0-3 1688.0 1688.0 1688.0 ZT4-7 2050.6 2050.6 2050.6 ZT8-11 1943.95 1943.95 1943.95 ZT12-15 2200.45 2200.45 2200.45 ZT16-19 2219.3 2219.3 2219.3 ZT20-23 1820.95 1820.95 1820.95