Geog Cluster 1 topic 3.2 PART 1 Flashcards
What is sampling?
Samplingis the process ofselecting a portion of a population being studied, usually to make generalisations about the population
what are the 2 types of sampling methods
Probability and non-probability sampling
What are the 2 types of probability sampling
Simple random and stratified random
What are the 2 types of non-probability sampling
Convenience and quota sampling
What are the advantages of probability sampling
Removes bias that may come from the choices of the researcher
Greater chance of creating a more representative sample
What are the disadvantages of probability sampling
More time consuming
What are the advantages of non-probability sampling
less time consuming
What are the disadvantages of non-probability sampling
Researchers may be biased when selecting samples
Samples are less representative
When is probability sampling used?
When a more representative sample is needed
When is non probability sampling used
When a more representative sample is not needed, e.g: conducting interviews, doing exploratory research
when there are time constraints
How is simple random sampling conducted?
Every member of the population is given a number.A random number generator is used to generate random numbers (e.g. 2, 5, 7) to select the samples
When is stratified random sampling used?
Stratified random sampling is used when the population clearly includes significantly different sub-groups
How is convenience sampling conducted
Convenience samplingis carried out in an ad hoc manner that is most accessible to the researcher
How is quota sampling conducted
Since quota samplingtakes into consideration factors, such as a person’s gender, age, and ethnicity, the population is first split into groups and convenience sampling will be conducted within their groups.
