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Learn about: Sampling: - methods - sample group - sample size
Learn to: Explore a range of projects to identify sample size, types,
Sampling: Researchers will use sampling in their investigations to answer their focus question or to prove or disprove their hypothesis. Sampling is used to reduce time and costs, and it is a representation of the population being investigated.
SAMPLING IN TERMS OF RESEARCH IS WHEN WE USE A SMALL GROUP OF PEOPLE TO REPRESENT A LARGER POPULATION.
If SJRC wanted to find out student thoughts about the college uniform, which method would be most suiteable?
Sampling:
Sampling:
The term sample refers to a small amount or part of something, which is intended to represent a larger amount of the whole. Sampling is required in research as we need people to participate in our study, so that we can collect primary data. It can be expensive and time consuming to gather information about the whole population in a study, so we use a 'sample' of people to represent the larger population.
Researchers use sampling in their investigations to answer their focus question or to prove or disprove their hypothesis. Sampling is used to reduce time and costs, and it is a representation of the population being investigated.
Researchers will have to decide on the sampling methods, sample group, and sample size.
Sampling methods include simple random sampling, systematic sampling, stratified sampling, cluster sampling, convenience sampling, volunteer sampling.
1.Watch the sampling video and then glue the Types of sampling methods sheet into books for notes.
2. Make a table in your books and for each of the sampling methods, provide the advantages and limitations of each method.
Random sampling
This type of sampling does not discriminate or have any criteria e.g. age or gender. Everyone has a chance to be part of the research when choosing the participants from a group.
Systematic
This means having a system to follow e.g. choosing every 5th person who walks into the shopping centre, 25% of people, 1 in 3 etc
Cluster
This sampling method includes groups, or clustersof individuals chosen at random from larger groups with common features e.g: 5 students chosen from each Yr 7 PDHPE class
Stratified
This is where the researcher chooses groups to enhance the diversity of participants. Participants are then randomly selected from each group. e.g: age, gender, culture, SES, health status, sexuality etc.
Sampling Size
This refers to how many participants are involved in the study. Sample size is important. A large sample that has been sampled well (stratified/random), to create widespread diversity, is going to yield more realistic, valid and reliable results.
Sampling Group
This refers to the individual people and/or groups that are involved in the study. This needs to reflect the focus of the research and links to validity.
Activity:
Discuss what sampling methods are you going to use in your research project?
Discuss the limitations of using only one sampling method, using a small sample size and a disconnected group.
Use the TWO links below and identify the following:
The sample group
The sample size
The sample method
https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1467-842X.2007.00057.x
https://bmchealthservres.biomedcentral.com/articles/10.1186/s12913-014-0635-9
THINK, PAIR, SHARE
Do you know the answers?
Describe how sampling is used in research
Outline the purpose of sampling and describe examples of sampling methods
What is random sampling?
When is cluster sampling used in research?
How is stratified sampling used in research?
What is the aim of systematic sampling?
Examine examples of when convenience samples are used
Compare different sampling methods
Describe the importance of using an appropriate sample group in research
Why is sample size important in research?
Past HSC Questions
Discuss the suitability of TWO sampling methods for this research topic researcher when using these sources of data (4) 2023
“Explain the importance of selecting an appropriate sample group and size when conducting research.” (6) 2022
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