Sampling techniques

Question 1

What is sampling?

Answer 1

Sampling is the group of people selected to take part in the study

Question 2

What is random sampling?

Answer 2

Each member of the target population has an equal chance of being selected
A strength is that doesn’t have any bias
A weakness is it that it could be unrepresentative of the population?

Question 3

What is systematic sampling and evaluation?

Answer 3

Participants are selected in a systematic way
For example, selecting every 10th person from target audience
The researcher cannot influence the selection removing bias
And it’s likely to be representative

Question 4

Stratified sampling definition and evaluation

Answer 4

The make up of sample reflects the make up of the target population
Say 60% of females in the whole country and 40% on males then six of the 10 people in the sample will be females
Random techniques are used so no bias
Representative of the tall population

Question 5

Opportunity sampling definition of evaluation

Answer 5

Participants are selected from whoever is easily available
The strength is that this is convenient less time-consuming and less costly
Could lead to research a bias and unrepresentative sample

Question 6

Volunteer sampling definition and evaluation

Answer 6

Participants put themselves forward to take part in the study
Easy inconvenient for the researcher
However, is open to volunteer bias