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Sampling, Ethics and Practical Issues

Target populations, sampling frames and access

  • 3 things to know
  • AS Unit 2 and A2 Unit 4

Overview

Target population of a study, sampling frame and gatekeeper in the context of gaining access.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Key term

Set out the ideas involved in getting from a whole population to the people actually studied.

Key term

Define the target population of a study.

Key term

What is a sampling frame?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Define the target population of a study.

    Model answer

    The whole group about which the researcher wants to draw conclusions.

  2. 2

    What is a sampling frame?

    Model answer

    A list of all the members of the target population from which a sample is drawn.

  3. 3

    Give two examples of lists that can serve as a sampling frame.

    Model answer

    The electoral register and a school's roll of pupils.

  4. 4

    Why must a sampling frame be complete for a random sample to be representative?

    Model answer

    Anyone missing from the list has no chance of selection, so groups omitted from it cannot appear in the sample.

  5. 5

    Give one reason a sampling frame may be out of date.

    Model answer

    People move, die or change status between the list being compiled and the sample being drawn.

  6. 6

    Explain why some target populations have no usable sampling frame.

    Model answer

    Groups defined by hidden or illegal activity, such as drug users, are not recorded on any list, so there is nothing to sample from.

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