Evaluate the usefulness of cluster sampling as a method of sampling.


	Evaluate the usefulness of cluster sampling as a method of sampling.
	Advantages easy + convenient economy - the regular two main concerns of expenditure (travelling + listing) are greatly reduced non-random sampling method likely to be of benefit where the customer base is widely spread	Disadvantages can have biased samples other probabilistic methods give fewer errors than this method# decreased precision - requiring a large sample which increased cost least representative of population which can skew results of the study
	Evaluation Th researcher divides the population into separate groups, called clusters. Then a simple random sample of clusters is selected from the population.

easy + convenient
economy - the regular two main concerns of expenditure (travelling + listing) are greatly reduced
non-random sampling method likely to be of benefit where the customer base is widely spread

Th researcher divides the population into separate groups, called clusters. Then a simple random sample of clusters is selected from the population.

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