Which audience analysis measurement principles and techniques are most effective and why?

Probability sampling is an effective analysis measurement principle. Probability sampling is when everyone in the population being surveyed has an equal chance to be sampled. It is a technique that includes the public opinion polling which relies on statistical extrapolation that can be very accurate. Probability sampling uses sample size, sample selection, margin of error, and confidence level to create accurate surveying. It is found that 384 people should be surveyed to provide 95% confidence that results have less than a 5% margin of error.

An effective technique is polling. Polling includes interviews, diaries, meters, people meters, and portable meters. These are the primary techniques that can be used in combination. For polling media forms meters, people meters, and portable meters are used to track television and radio channels that are being watched. These are more reliable than diaries and interviews because they can constantly track channels inside and outside of the home.