Final answer:
The question's data does not specify the percentage of U.S. psychologists' engagement in activities; however, it points to business and nonprofit sectors as likely high employment areas (10%) and medical school and independent practice as lower ones (6%). Industrial and Organizational psychology is another noted employment avenue.
Step-by-step explanation:
The data provided does not directly answer what percentage of U.S. psychologists engage in various activities within their field. However, from the information on employment options for those with a BA in Psychology, we can infer that business or nonprofit sectors employ 10% of the graduates, which might be among the highest employment areas for psychologists. Additionally, independent practice and medical school employment each account for 6%, suggesting these might be among the lower employment areas for psychologists after graduation. The field of Industrial and Organizational (I-O) psychology is mentioned as impacting the physical and psychological wellbeing of workers, pointing towards another area of work for psychologists.
No specific percentages were provided about the rate of engagement in activities such as cultural research or political participation among psychologists. It is mentioned that the American Psychological Association has ethnically based organizations that promote research into cultural psychology, but specific engagement levels are not described. For an accurate % representation of activities engaged by U.S. psychologists, one would need to refer to a detailed report or study that provides such statistics.