1
Q
Census advantages
A
Give a Completely accurate result
2
Q
Census disadvantage
A
- Time consuming and expensive
- Hard to process large quantity fo data
3
Q
Sample advantages
A
- less time consuming and more expensive than a census
- fewer pp to respond
4
Q
Sample disadvantages
A
- data may not be accurate
- may not be large enough to give info of small sub groups
5
Q
Simple random sampling
A
Sample of size has equal chance of being selected - like lottery, calculator, computer etc
- easy and cheap for small populations
- not suitable for large population size
6
Q
Systematic sampling
A
The required elements are chosen at regular intervals from an ordered list
- Suitable for large samples and large populations
- can reduce bias if sampling frame is not random
7
Q
Stratified sampling
A
Population is divided into mutually exclusive strata ( males and females for ex) and a random sample taken from each
- affects population structure
- sampling frame needed
8
Q
Non random sampling - Quota
A
- interview or researcher selected a sample that reflects the characteristics of the whole population
- small sample which is representative
- must be divided into groups so could be accurately or inaccurate
9
Q
Non random sampling - Opportunity
A
- taking the sample from people who are variable at time of study that is carried out and fit criteria
- easy to carry out
- Highly dependent on individual researcher
