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

Probability sampling is the most effective way of surveying mass audiences. This method utilizes the magic number, 384, for the sample size in order to ensure a reliable outcome. An important part of probability sampling is choosing the sample selection to be sure of who exactly you are interviewing/surveying. Before conducting a survey, using the method of probability sampling, you must decide on an acceptable margin of error. By choosing an acceptable margin of error it increases the pollster’s confidence level in the survey. The basic principle of probability sampling is the fact that everyone in the population has an equal chance to be sampled.