Sampling

Question 1

What is stratified sampling

Answer 1

Researchers divide subjects into subgroups called strata based on characteristics that they share

This is then divided by the population to create representative data

Question 2

Give an example of stratified sampling

Answer 2

A class has 20 students
18 male and 2 female
A researcher wanted a sample of 10
The sample would consist of 9 randomly chosen males
And 1 randomly chosen female
To represent this population.

Question 3

What is random sampling

Answer 3

Sampling without bias, all options have an equal chance

Question 4

Give an example of random sampling

Answer 4

The first 20 names pulled out of a hat containing 100 names would be chosen

Question 5

Describe systematic sampling

Answer 5

A method of sampling which uses equal intervals between each subject

Question 6

Give an example of systematic sampling

Answer 6

Every 3rd person in the line would be selected

Question 7

What is volunteer sampling

Answer 7

Where participants willingly choose to take part in the study

Question 8

Give an example of volunteer sampling

Answer 8

Milgram: participants chose to join the experiment through an advert

Question 9

What is opportunity sampling

Answer 9

When the sample is already accessible for the researcher

Question 10

Give an example of opportunity sampling

Answer 10

Town centre surveys

Question 11

With 1 being most representative and 5 being least representative, rank the sampling methods

Answer 11

1) stratified sampling
2) random sampling
3) systematic sampling
4) volunteer sampling
5) opportunity sampling