condition mean min max ZT0-3 2247.0 2247.0 2247.0 ZT4-7 1826.4 1826.4 1826.4 ZT8-11 1720.15 1720.15 1720.15 ZT12-15 1639.6 1639.6 1639.6 ZT16-19 2042.5 2042.5 2042.5 ZT20-23 2296.25 2296.25 2296.25