Sampling allows you to draw conclusions about a particular population by examining a part of it. When carrying out a survey, or other information gathering exercise, it is not usually possible to ask questions of all the people that you would want to, unless the numbers involved are very small. Instead, you usually collect information from only a proportion or sub-set of your population, which is usually referred to as a sample. This briefing covers some sampling methods that you can use when carrying out surveys.

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