A Researcher Wants to Study the Effects of Social Class

Multiple Choice

A researcher wants to study the effects of social class on consumption behavior. He establishes three different categories of social class in terms of amount of income. He then assigns each field worker a specified number of interviews with people in each income category although the interviewers are allowed to select who they interview. This is an example of

A) probability sampling.
B) stratified sampling.
C) systematic sampling.
D) quota sampling.
E) random sampling.