condition mean min max ZT0-3 157.15 157.15 157.15 ZT4-7 111.6 111.6 111.6 ZT8-11 481.75 481.75 481.75 ZT12-15 4629.5 4629.5 4629.5 ZT16-19 4453.3 4453.3 4453.3 ZT20-23 815.6 815.6 815.6