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Applied Methods: Designing Sociological Research

Selecting and justifying a sample

  • 3 things to know
  • A2 Unit 4

Overview

Opportunity sampling and systematic sampling.

What you need to know

Answer each one before you reveal it.

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Key term

Why is a sampling frame necessary for random sampling?

Key term

Give two sampling frames a sociologist might realistically use.

Key term

When is quota sampling the sensible choice in a design?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What part does a sampling frame play in a research design?

    Model answer

    It is the list of the research population from which the sample is drawn, and it fixes who can possibly be selected.

  2. 2

    Why is a sampling frame necessary for random sampling?

    Model answer

    Every member must have a known and equal chance of selection, which is impossible unless they all appear on a list.

  3. 3

    Give two sampling frames a sociologist might realistically use.

    Model answer

    A school roll and the electoral register are both used, since each lists a defined population in a form that can be sampled.

  4. 4

    Justify the choice of stratified random sampling for a study within a school.

    Model answer

    Dividing the roll by year group and sex and then sampling at random within each category ensures the sample mirrors the school's composition rather than leaving it to chance.

  5. 5

    When is quota sampling the sensible choice in a design?

    Model answer

    When no sampling frame exists but the composition of the population is known, so interviewers can be sent to fill set numbers in each category.

  6. 6

    Justify the choice of snowball sampling for a study of drug users.

    Model answer

    There is no list of a hidden and illegal population, so one contact introducing others is often the only realistic way to reach enough participants.

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