condition mean min max ZT0-3 2109.7 2109.7 2109.7 ZT4-7 429.6 429.6 429.6 ZT8-11 572.5 572.5 572.5 ZT12-15 1125.65 1125.65 1125.65 ZT16-19 2044.15 2044.15 2044.15 ZT20-23 2479.65 2479.65 2479.65