<On average, african americans are taller than white men and have a higher muscular density.>

Are you comparing direct descendants of Yoruba versus descendants of Celts in America ? or mixed descendants of Bantu and Cherokee versus mixed descendants of Anglo-Saxons and Slavs ? In your study would Barack Obama be a person of color or a person of pallor ?

Or is this data you have gathered observing people at Costco. Just checking on your scientific methodology.