Data Collection Flashcards
1
Q
What is a population?
A
- the whole set of items that are of interest
2
Q
What is a census?
A
- observes or measures every member of a population
3
Q
What is a sample?
A
- a selection of observations taken from a subset of population which is used to find out information about the population as a whole
4
Q
What are the advantages and disadvantages of censuses and samples?
A
5
Q
What is a sampling unit?
A
- individual units of a population
6
Q
What is a sampling frame?
A
- sampling units of a population are individually named or numbered to form a list which is the sampling frame
7
Q
What are the three methods of random sampling?
A
- simple random sampling
- systematic sampling
- stratified sampling
8
Q
What is systematic sampling?
A
- the required elements are chosen at regular intervals from an ordered list
9
Q
What is stratified sampling?
A
- the population is divided into mutually exclusive strata and a random sample is taken from each
10
Q
What is simple random sampling?
A
- a simple random sample of size n is one where every sample size n has an equal chance of being selected
11
Q
What are the advantages and disadvantages of systematic sampling?
A
12
Q
What are the advantages and disadvantages of stratified sampling?
A
13
Q
What are the two types of non-random sampling?
A
- quota sampling
- opportunity sampling
14
Q
What is quota sampling?
A
- a sample is selected that reflects the characteristics of the whole population
15
Q
What is opportunity sampling?
A
- taking samples from people who are available at the time the study is carried out and who fit the criteria you are looking for
16
Q
What are the advantages and disadvantages of quota sampling?
A
17
Q
What are the advantages and disadvantages of opportunity sampling?
A
