condition mean min max ZT0-3 277.45 277.45 277.45 ZT4-7 269.1 269.1 269.1 ZT8-11 270.0 270.0 270.0 ZT12-15 479.4 479.4 479.4 ZT16-19 621.3 621.3 621.3 ZT20-23 441.85 441.85 441.85