RM: Sampling techniques

Question 1

What are the sampling techniques?

Answer 1

• volunteer
• random
• systematic
• stratified
• opportunity

Question 2

What is a volunteer sample?

Answer 2

Ppts select themselves through adverts

Question 3

What is a strength of volunteer samples?

Answer 3

Ppts are willing bc they select themselves and know what is involved so are more likely to engage

Question 4

What is a random sample?

Answer 4

Every person in the population has an equal chance of being selected using a lottery method

Question 5

What is an advantage of random sampling?

Answer 5

Potentially unbiased bc extraneous and confounding variables are controlled which enhances internal validity

Question 6

What is a disadvantage of random sampling?

Answer 6

Time consuming and may not work bc a complete list is hard to obtain and some people may refuse to take part

Question 7

What is a systematic sample?

Answer 7

Ppts are selected using a set pattern where every nth person is chosen

Question 8

What is an advantage of systematic sampling?

Answer 8

Unbiased bc first person is chosen randomly meaning that it is objective

Question 9

What is a disadvantage of stratified sampling?

Answer 9

Time consuming and may not work bc a complete list is hard to obtain and some people may refuse to take part