condition mean min max ZT0-3 2579.5 2579.5 2579.5 ZT4-7 2403.5 2403.5 2403.5 ZT8-11 1906.65 1906.65 1906.65 ZT12-15 1876.2 1876.2 1876.2 ZT16-19 1783.4 1783.4 1783.4 ZT20-23 1659.35 1659.35 1659.35