Sampling Flashcards
Population
The people who live in a society
Research population
The group of people you want to study
Sample
The people who actually take part in your study
Sampling frame
A list of the names of all the people belonging to the research population e.g. school registers, electoral rolls
Representative
The extent to which a sample mirrors the research population and reflects its characteristics
Generalisability
The extent to which the findings can be applied to the research population
Representativeness: Sample size
Too small = not representative; the ideal size is when making it any larger wouldn’t produce much more representative data
Representativeness: Sampling frame
Very important that everyone is included
Representativeness: Sampling method
If chosen wisely relatively small samples can be very accurate
Random sampling
Every person in the survey population has the same chancer of being selected often by numbering them
Systematic sampling
Names are selected at regular intervals until the sample size is reached
Stratified random sampling
Stratify the sample frame into smaller sample frames based on certain groups
Quota sampling
Interviewers find people that fit certain categories, according to their proportion in the research population, until they reach their quota, open to researcher’s bias
Snowball sampling
Used when there isn’t a sample frame so you need introductions from p’s to others