What is random sampling?
Researcher randomly selects a sample from a population, everyone has an equal chance of being picked
What is volunteer sampling?
Researchers seek volunteers for their study
What is opportunity sampling?
Researcher uses whoever is willing to take part in the study at the time
What is stratified sampling?
A representative sample of target population who the researcher wishes to generalise to
What is systematic sampling?
Researchers pick participants of population from regular interval e.g. every 3rd person