Why do some rank so low?

     A report was just released that predicted a person's likelihood of success.  An Asian was ranked highest, then white kids,  Both groups were given scores of over 700.  Ranked low on the scale were blacks and native Americans with scores barely over 400.  Why the big difference and why are some ranked so low?
     In the Asian group, it was only the Asians from Japan, China and the Philippines that were ranked really high while other Asian groups   didn't fair so well.  To me that rules out the ethnic influence.  I never really believed that race had anything to do with ones abilities to learn but a great deal to do with if we learned.  In other words, a kid doesn't fail because he is black but fails because he is raised in a black environment.  Whoa, I know I made some upset by that comment and I certainly don't mean to do so. 
   I have black relatives and they are highly successful people.  In fact my niece just graduated high school at 15.  Being intelligent has nothing to do with skin color but the values held by the community one was raised in has a tremendous influence on how well you do in school.  In certain Asian communities education is highly  prized and the children in those communities do well in school.  The biggest problem is sometime the parents push the kids too hard academically and the children suffer in other areas.  But in certain other cultures education is looked down on and the children in those cultures do not fair as well. 
   It isn't a matter of giving underprivileged children more opportunities  but changing the prevalent attitude about education in those communities.  There seems to be a big emphasis on sports and music in the black community but the reality is being highly successful in those endeavors is akin to becoming rich by playing the lottery. 
   I can understand the low scores from the Mexicans.  Again, the scores are not ties to race or ethnic background.  People from Cuba do much better than citizens from Latin America. In these cases it isn't so much a bad attitude towards education as it is fear of being deported because they are in this country illegally.  There is a distrust of others and the language barrier.  These people are denying themselves opportunities. 
   I live in a mixed race neighborhood and how people live is different based on ethnic background.  The black families seem to be the nicest people in the neighborhood but the black children seem to be the most likely to be arrested,  The Mexican families have messy yards, are very unfriendly and are less likely to obey local laws like licensing and building codes and burning permits.  We do have some  Asians in the neighborhood but they tend to be more private. 
   The white families show the most diversity and the teenagers tend to be either extremely nice kids or total jerks showing a total lack of upbringing and discipline.  It seems the more pride a family takes in their home the better behaved their children tend to be.  I don't know how that relates to success but I would think it would all relate.