condition mean min max ZT0-3 227.35 227.35 227.35 ZT4-7 427.7 427.7 427.7 ZT8-11 342.5 342.5 342.5 ZT12-15 359.4 359.4 359.4 ZT16-19 262.8 262.8 262.8 ZT20-23 168.65 168.65 168.65