In the 1970s, authoritarian regimes ruled how much of the world?

When is a stratified sample an appropriate sampling technique?

a) specific characteristics of the population are of no concern b) individuals in a population are not equal c) each member must have an equal chance of being selected d) you have a small population

Which statement about geographic region and political preference is correct?

A) The South has always been solidly Democratic. B) The country overall is becoming more Republican. C) The heaviest concentrations of Republicans are found in the Northeast. D) Regional differences are less important today than just a few years ago. E) Party affiliation and political attitudes are primarily determined by geography.