1. In a democracy, people express their opinions in different ways. Polls are one of the most common methods

used for gathering and measuring public opinion.

Essay:

(a) Identify the most important principle that must be considered when developing a good opinion poll,

and explain how it is achieved.

(b) Explain what sampling error means, and describe what leads to sampling error in a poll.

(c) Explain what a push poll is, and why it is employed.