1) Most crime is committed by people between the ages of 14-24, likely due to factors like peer pressure and lack of parental supervision. 2) Males commit around 90% of certain crimes like burglary and robbery, possibly because of different socialization and opportunities to commit crimes. 3) Ethnic minority groups, especially Afro-Caribbean people, make up a disproportionate percentage of the prison population, possibly because of actual higher crime rates or systemic racism in the criminal justice system.