WJEC A-Level Sociology 601-5237-0
Culture and the Social Construction of Culture
Socialisation and Its Agencies
Socialisation and Identity
Families and HouseholdsAcquiring Culture
Youth CulturesAcquiring Culture
Research Methods: Primary and Secondary
Sampling, Ethics and Practical Issues
Key Concepts and Theories of Research
EducationUnderstanding Society
MediaUnderstanding Society
ReligionUnderstanding Society
Crime and DeviancePower and Control
Health and DisabilityPower and Control
World SociologyPower and Control
Applied Methods: Designing Sociological Research
Social Inequality: Evidence and Patterns
Theories and Explanations of Inequality and Stratification
Sampling, Ethics and Practical Issues
Simple random and systematic random sampling
- 3 things to know
- AS Unit 2 and A2 Unit 4
Overview
Simple random sample, systematic random sampling and risk of periodicity in systematic sampling.
What you need to know
Answer each one before you reveal it.
Give one advantage of simple random sampling.
Give one disadvantage of simple random sampling.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is a simple random sample?
Model answer
A sample in which every member of the sampling frame has an equal chance of being selected.
- 2
How is a simple random sample usually drawn in practice?
Model answer
By numbering everyone on the sampling frame and selecting numbers using a random number generator.
- 3
Give one advantage of simple random sampling.
Model answer
Selection is free from researcher bias because chance alone decides who is included.
- 4
Give one disadvantage of simple random sampling.
Model answer
By chance it may under-represent a small group in the population, so the sample can still be unrepresentative.
- 5
What is systematic random sampling?
Model answer
Selecting every nth person from the sampling frame after a random starting point.
- 6
If a researcher wants a sample of 100 from a list of 2,000, what sampling interval should they use?
Model answer
Every twentieth person, because 2,000 divided by 100 is 20.
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