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SAMPLING - Coggle Diagram
SAMPLING
Cluster
Not selecting deom the whole population
Reduces costs
One or a specific number groups to draw samples
Not fully representative
Random methods to choose the sample group can be used
Snowball
To recruit further participants through their acquaintances
Cheap and operated through social networking sites
Using existing members of a sample study group
Biased sample
Quota
Eg. male & female
Non-scientific, biased
Specific sub-group
Random
Representative
A coputer randomly chooses the specific amount of people from a target list
Everyone has an equal chance of being selected
Stratified
Then random sampling is used to select the final sample.
Representative of specific segment
Sample from a specified segment of the population.
Convenience
Volunteering or selecting people because of their availability
Might not be representative
Biased by volunteers
.
Primary research methods
Cost and time are common restrains
Bigger samples = more confidence given to the final results
Sampling error
Caused by using a sample instead of the whole target population
Sample
Group of people taking part in a market research survey selected to be representative of the target market overall