Sampling Flashcards
Define population
a large group of individuals who the researcher may be interested in studying
Define target population
sub group of the general population
Define sample
group of people who take part in the research and these are people that are drawn from the target populations and need to be representative of the population
Define generalisation
the extent to which the findings and conclusions from a study can be broadly applied to the population (if sample is representative, it’s accurate)
What is random sampling?
when all the members of a target population have an equal chance of being selected
strength of random sampling
-free from researcher bias
limitation of random sampling
-time consuming
-higher refusal rates
-sample could be unrepresentative
what is systematic sampling?
when the participants are chosen by every nth term after being listen in a certain way with the population and the collection of all the nth terms are used as a sample
strength of systematic sampling
-avoids researcher bias
-representative sample
limitation of systematic sampling
-higher refusal rates
-very time consuming
what is opportunity sampling?
when you select the sample that u need by simply selecting them as they come (best example is street selection)
strength of opportunity sampling
-convenient
-less costly
limitation of opportunity sampling
-high refusal rates
-unrepresentative
-researcher has complete control over selection
what is volunteer sampling?
the participants volunteer and come to you themselves (self-selection)
strength of volunteer sampling
-easy
-minimal input from researcher
