The purpose of this blood serum test is to help detect and evaluate treatment of acute hepatic disease, especially hepatitis, and cirrhosis without jaundice. To help distinguish between mytyocardial (heart) and liver tissue damage (used with the AST enzyme test). Also to assess hepatotoxicity of some drugs.
The average wingspan for an NBA player (even normal 6'0 guys) is +4 inches. I think that around your height thing is just an estimate. For the general population, the average might be +2 inches.
It is estimated that the worldwide average height for an adult human male is about 172 cm (5 ft 71â2 in), while the worldwide average height for adult human females is about 158 cm (5 ft 2 in). Shrinkage of stature may begin in middle age in some individuals, but tends to be typical in the extremely aged.