Which of the following is NOT a bias associated with opinion polls?

The selection of "public bias" as the correct answer highlights an important understanding of how biases function in the context of opinion polls. While question order, sampling, and response biases are well-documented issues that can significantly affect the results of opinion polls, "public bias" is not a recognized category of bias in this context.

Question order bias occurs when the sequence in which questions are asked influences respondents' answers. For instance, the way a question is framed or the order in which topics are presented can lead to skewed results. Similarly, sampling bias arises when the sample chosen for the poll does not accurately represent the larger population, which can compromise the validity of the findings. Response bias refers to the tendency of respondents to answer questions inaccurately due to various factors, such as social desirability or misunderstanding of the question.

In contrast, "public bias" does not have a defined meaning within the study and analysis of opinion polls. It suggests an expectation of a consensus or trend based on public perception but does not represent a specific bias that influences how data is collected or interpreted. Thus, identifying "public bias" as the answer underscores its absence as a concept within the established frameworks of polling methodology.