Sampling

Question 1

What is sampling?

Answer 1

The process of selecting a representative group from the population under study
We want it to be representative so we can generalise the results

Question 2

What is sampling bias?

Answer 2

Sampling bias occurs when the sample does not reflect the characteristics of the target population

Question 3

What is random sampling?

Answer 3

This technique involves everyone in the target population having an equal chance of being selected

Question 4

What is volunteer sampling?

Answer 4

Sample consists of those who have offered to be in the study. This can be for free or sometimes incentives (such as money) can be offered

Question 5

What is opportunity sampling?

Answer 5

This method uses people from the target population available at the time who are willing to take part – based on convenience

Question 6

What is stratified sampling?

Answer 6

This involves identifying different types of people that make up the target population and working out the proportions needed in order for the sample to be representative

Question 7

What is systematic sampling?

Answer 7

Chooses subjects in an orderly way from the target population, like every nth participant on a list of names.