This document discusses public opinion, political socialization, and factors that influence them. It defines public opinion as the politically relevant opinions that citizens openly express through words or actions. It also discusses how polling and public opinion polls work using probability sampling to estimate opinions of a whole population from a small random sample. The document then covers political socialization, which is the lifelong learning process through which people acquire their political beliefs, values, and outlooks. It lists the major agents of political socialization, such as family, schools, media, peers, and political institutions. Finally, it notes some key factors like race, religion, region, and urban/rural differences that affect public opinions.