sampling Flashcards
whats a sample
group of people chosen to take part in sociological research
total population
group from which you’ll pickyour sample
sampling method
procedure used to select p’s from total pop
sampling frame
list of ppl from total pop, used to help them pick a sample
what is random sampling
every member of target pop has equal chance of being selected for sample
how to carry out random sampling
- get list of all members of t.p
- give each person a number
- sample selected using random method
what is opportunity sampling
choosing people of target pop who are available and willing to take part
how to carry out opportunity
poster
what is systematic sampling
selecting every nth number on a list of target pop
how to carry out systematic
- list of t.p
- select nth number
- repeat until complete
what is stratified sampling
selecting p’s in proportion to frequency in t.p
how to carry out stratified
- identify diff subgroups making up t.p
- work out proportions needed for sample to be rep
- p’s randomly selected to reflect this
what is snowball sampling
collecting sample by making contact with particular person/group
how to carry out snowball
- make contact
- p recommends another person fitting criteria
- recommend until have enough for sample