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Marketing Research - Sampling (Cluster sampling (Cluster sampling means…
Marketing Research - Sampling
Cluster sampling
Cluster sampling means that people will choose randomly in the group which divided by cluster, and Cluster sampling often uses regions to group,
disadvantages
Doesn't need complete population information
Good for face-to-face surveys
Quick and easy
advantages
Greater risk of sampling error
Expensive if the clusters are large
Convenience sampling
only choose randomly
advantages
Large amounts of information can be gathered quickly
Subjects are readily available
disadvantages
Prone to volunteer bias
The sample is not representative of the entire population, so results can't speak for them - inferences are limited. future data
Quota sampling
People would pick a representative sample and for example people would often divide by income gender age
disadvantages
Not random, so some risk of bias
Need to understand the population to be able to identify the basis of stratification
advantages
Quick and easy way of obtaining a sample
Simply random sampling
every items will get same chance to be picked
advantages
Can calculate both estimate of the population and sampling error
Simple to design and interpret
disadvantage
May not be practical if the sample requires lots of small visits over the country
Need a complete and accurate population listing
Systematic sampling
people will choose a number, and then, they will use intervals to choose later objects. For example, people choose the 1 and then choose 3, so they will choose 5,7,9 and so on
advantages
Easier to extract the sample than via simple random
Ensures sample is spread across the population
disadvantages
Can be costly and time-consuming if the sample is not conveniently located
Judgement sampling
they will choose the sample really careful and serious
advantages
Good for providing illustrative examples or case studies
disadvantages
Samples often small
Cannot extrapolate from sample
Very prone to bias
Sampling refers to the random selection of people or objects to ask questions or test and get feedback from them
there are many ways to select sample and in different situation, people will chose different way. It always depend on the size of sampling.