Lesson 6: Sampling Methods

Question 1

What is random sampling?

Answer 1

When every member of the target population has the same chance of being selected.

Question 2

Advantages of random sampling

Answer 2

1. Results can be generalised

2. No researcher bias

Question 3

Disadvantages of random sampling

Answer 3

1. Can be difficult to get full list of target population

2. Not all members if the target population would be willing to take part

Question 4

What is systematic sampling?

Answer 4

When participants are selected by taking even Nth person from a list

Question 5

Advantages of systematic sampling

Answer 5

1. More straightforward then random sampling

Question 6

Disadvantages of systematic sampling

Answer 6

1. It is not guaranteed to be representative

2. Not all members selected would be willing to take part

Question 7

What is stratified sampling?

Answer 7

Stratified sampling involved classifying the population into categories and then randomly choosing a sample from each category. They are divided into strata.

Question 8

Advantages of stratified sampling

Answer 8

1. All groups are included, and the sample is representative of the population

Question 9

Disadvantages of stratified sampling

Answer 9

1. Time consuming, categories have to be made and calculated

Question 10

What is opportunity sampling?

Answer 10

Selecting participants who are readily able and willing to take part. Easy access.

Question 11

Advantages of opportunity sampling

Answer 11

1. Easiest and quickest method of sampling

Question 12

Disadvantages of opportunity sampling

Answer 12

1. Sample might not be representative

Question 13

What is volunteer sampling?

Answer 13

Involves people volunteering, researchers can advertise

Question 14

Advantages of volunteer sampling

Answer 14

1. Saves researcher time and effort, participants come to them

Question 15

Disadvantages of volunteer sampling

Answer 15

Enthusiastic people tend to volunteer more often, volunteer bias.