Sampling Techniques

Question 1

What are 5 different sampling techniques?

Answer 1

1. Random sampling
2. Volunteer sampling
3. Opportunity sampling
4. Snowball sampling
5. Stratified sampling

Question 2

What is random sampling and what is 1 disadvantage of it?

Answer 2

Where everybody has an equal chance of being randomly selected, e.g. taking names out of a hat or computer generated.
D - chance of being biased.

Question 3

What is volunteer sampling and what is 1 disadvantage of it?

Answer 3

Advertise people to help you.
D - volunteers may be more motivated to participate so may not reflect population and may results may have demand characteristics.

Question 4

What is opportunity sampling and what is 1 disadvantage of it?

Answer 4

Asking anyone you can find to participate.
D - most of the population is excluded as you are only asking people from 1 area. May also be unconscious experimenter bias.

Question 5

What is stratified sampling and what is 1 disadvantage of it?

Answer 5

Sub groups in a population are identified and participants are then chosen to represent these groups.
D - if you miss out a certain group they won’t be represented.

Question 6

What is snowball sampling and what is 1 disadvantage of it?

Answer 6

Starting with a few and then a asking them to direct you to other suitable participants.
D - may be a biased, unrepresentative sample as they may be friends or family that are from the same area, age, gender, etc.