6.1.7
Sampling
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Sampling
Sampling is a way that sociologists use in order to select the group that they will study out of a target population.

Probability sampling
- Probability sampling is sampling that is based on a known population.
- Probability sampling is divided into the following categories:
- Random.
- Systematic.
- Stratified.

Non-probability sampling
- Non-probability sampling is sampling that is based on unknown populations.
- For example, homeless people.
- Non-probability sampling is divided into the following categories:
- Snowball.
- Quota.

Sample surveys
- Sociologists use sample surveys to solve some of the practical problems they might face such as the time and money spent on studying everyone in a target group.
- This is why sociologists try to collect data from a representative sample out of the larger population.

What is a sampling frame?
- A sampling frame is a list of people in the population that the researcher wants to study.
- These lists need to be accurate (they need to be regularly updated and complete)
- Inaccurate lists might affect the results of the study, making it invalid.
Types of Sampling
A sampling frame is a list of people in the population that the researcher wants to study. These lists need to be accurate. Inaccurate lists might affect the results of the study, making it invalid.

Probability samples (known populations)
- Random:
- Everyone has an equal chance of being selected. It is like drawing names out of a hat.
- Systematic:
- Every nth person from a list is selected.
- Stratified:
- When a sample is taken out of a certain category e.g. age, gender, social class etc. to be representative of the total population.

Non-probability samples (unknown populations)
- Snowball:
- Each member of the initial group suggests someone else who can take part in the study. It works the same way as a snowball.
- It starts as a small snowball on which more and more snow is added to make it bigger and bigger.
- Quota:
- The researcher selects the group based on one’s fixed characteristic e.g. age, gender etc.
1The Sociological Approach
1.1Introduction to Sociology
1.2Sociological Approaches
1.3The Consensus vs. Conflict Debate
2Families
2.1Functions of Families
2.2Family Forms
2.3Conjugal Role Relationships
2.4Changing Relationships Within Families
2.5Criticisms of Families
3Education
3.1Roles & Functions of Education
3.2Processes Within Schools
4Crime & Deviance
4.1The Social Construction of Crime
4.2Social Control
4.3Criminal & Deviant Behaviour
5Social Stratification
5.1Social Stratification
5.2Poverty as a Social Issue
6Sociological Research Methods
6.1Research Methods
6.1.1Research Design6.1.2The Scientific Method6.1.3Other Considerations6.1.4Primary Sources6.1.5Secondary Sources6.1.6Surveys6.1.7Sampling6.1.8Questionnaires6.1.9Interviews6.1.10Observation6.1.11Statistics6.1.12Case Studies6.1.13Longitudinal Studies6.1.14Ethnography6.1.15Experiments6.1.16Small Scale Research6.1.17End of Topic Test - Research Methods
Jump to other topics
1The Sociological Approach
1.1Introduction to Sociology
1.2Sociological Approaches
1.3The Consensus vs. Conflict Debate
2Families
2.1Functions of Families
2.2Family Forms
2.3Conjugal Role Relationships
2.4Changing Relationships Within Families
2.5Criticisms of Families
3Education
3.1Roles & Functions of Education
3.2Processes Within Schools
4Crime & Deviance
4.1The Social Construction of Crime
4.2Social Control
4.3Criminal & Deviant Behaviour
5Social Stratification
5.1Social Stratification
5.2Poverty as a Social Issue
6Sociological Research Methods
6.1Research Methods
6.1.1Research Design6.1.2The Scientific Method6.1.3Other Considerations6.1.4Primary Sources6.1.5Secondary Sources6.1.6Surveys6.1.7Sampling6.1.8Questionnaires6.1.9Interviews6.1.10Observation6.1.11Statistics6.1.12Case Studies6.1.13Longitudinal Studies6.1.14Ethnography6.1.15Experiments6.1.16Small Scale Research6.1.17End of Topic Test - Research Methods
Practice questions on Sampling
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- 1
- 2The three types of probability samples (known populations) are:Fill in the list
- 3What are the two types of non-probability samples?Multiple choice
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