This course examines how sampling techniques can be applied in survey research. We begin by looking at the role of sampling in the survey process. We introduce the basic principles of sampling theory and how this relates to sampling strategies and sample design in a practical context. Practical exercises address the questions of the required sample size and precision of estimates, sampling strategies and when sample surveys are appropriate. This course, together with the ‘Questionnaire Design’ course above, provides important guidance for any researcher planning a survey.