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Steps for working out the radius.…read more

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Karina Gahir
DIFFERENT METHODS OF
SAMPLING…read more

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Convenience Sampling.
You just pick somewhere to stand and
ask the people who come past.
ADVANTAGES DISADVANTAGES
· Easy to do · It is biased
· Cheap to do…read more

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Quota Sampling.
The people in the sample just have to be of a particular
type.
This is often used by market researchers doing
interviews in the street. The might be told to look for:
20 women with young children
30 businessmen
50 teenagers
As long as people meet these criteria it is up to the
interviewer who to ask.
ADVANTAGES DISADVANTAGES
· Easy to do · It is easily biased
· Quick to use · People can refuse to take part
· Any member if the sample can be · People can have similar views
replaced by one with the same
properties…read more

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Cluster Sampling.
The population is split into smaller
groups called clusters. One or more
clusters are chosen at random. The
sample is everyone in those clusters.
ADVANTAGES DISADVANTAGES
· Easy to do · It is biased if the clusters
· Saves on travel when are different
population is spread over a
large area…read more

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