condition mean min max ZT0-3 753.7 753.7 753.7 ZT4-7 797.5 797.5 797.5 ZT8-11 601.15 601.15 601.15 ZT12-15 802.8 802.8 802.8 ZT16-19 672.05 672.05 672.05 ZT20-23 672.55 672.55 672.55