News cameras take an overhead picture of a part of a crowd at an outdoor event. Journalists then count the number of people in the picture and use the sample to estimate the total number of people in the crowd. This process is an example of?
random sampling.
stratified sampling.
systematic random sampling.
cluster sampling
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Answer:
D) Cluster sampling
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This process is an example of cluster sampling.
- Cluster sampling includes the concept of probability and functions by dividing the sample space into multiple clusters.
- It is feasible when the information about the entire sample space is not available or attainable and so the research is based on the clusters formed.
- Here, the journalist does not know the actual number of people in the crowd but used the cluster visible to him in the photograph.
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