3.2c Sampling Flashcards
1
Q
Representative sample
A
Where it is impractical to measure every individual, a representative sample of the population is selected. It should share the same mean and the same degree of variation about the mean as the population as a whole.
2
Q
What does natural Variation determine?
A
The extent of the natural variation within a population determines the appropriate sample size.
More variable populations require a larger sample size.
3
Q
Random sampling
A
Members of the population have an equal chance of being selected.
4
Q
Systematic sampling
A
Members of a population are selected at regular intervals.
5
Q
Stratified sampling
A
The population is divided into categories that are then sampled proportionally.
