sampling Flashcards
population
a group of people who are the focus of researchers interest, from which a smaller sample is drawn.
sample
a group of people who take part in the investigation, a sample is drawn from a target population which is presumed to be representative or the population
bias
in the context of sampling, when a certain group in under or over represented.
generalisation
the extent to which findings and conclusions can be widely applied to the population
types of sampling
stratified, systematic, random , opportunity, volunteer
random sample
all members of the target population have an equal chance of being selected, this can be done through the lottery method
stratified sampling
subgroups (strata) are used to represent proportions of people within the target population
systematic
every nth number member of the target population is selected
Opportunity sampling
selecting pps who are willing and available
they ask anyone who is around at the time of the study.